0:06 Class 10 science life processes MCQ's
0:08 master class complete chapter covered
0:10 all topics.
0:14 One which of the following is not a life
0:19 process. A respiration B reproduction C
0:23 photosynthesis D walking.
0:26 Check mark correct answer D walking.
0:29 Right arrow explanation. Walking is a
0:32 voluntary action not a basic life
0:34 process necessary for survival of the organism.
0:36 organism.
0:39 Two, which gas is released during photosynthesis?
0:41 photosynthesis?
0:45 A. Carbon dioxide. B. Nitrogen. C.
0:48 Oxygen. D. Hydrogen.
0:52 Check mark. Correct answer. C. Oxygen.
0:55 Right arrow. Explanation. Photosynthesis
0:59 produces oxygen as a byproduct.
1:02 Three, the breakdown of pyrovate into
1:06 ethanol and CO occurs in Aerobic
1:09 respiration, B an aerobic respiration in
1:13 yeast, C aerobic respiration in plants,
1:16 D aerobic respiration in animals. Check
1:19 mark correct answer. B. An aerobic
1:21 respiration in yeast. Right arrow
1:24 explanation. Yeast performs alcoholic
1:28 fermentation in absence of oxygen.
1:31 Four. Which of the following is the site
1:33 of photosynthesis?
1:37 A. Mitochondria. B. Ribosomes. C.
1:41 Chloroplast. D. Nucleus.
1:43 Check mark. Correct answer. C.
1:46 Chloroplast. Right arrow. Explanation.
1:49 Chloroplast contains chlorophyll for photosynthesis.
1:51 photosynthesis. Five.
1:52 Five.
1:54 Movement of food through the esophagus
1:58 is called A. Paristalysis, B
2:03 respiration, C digestion, D ingestion.
2:06 Check mark correct answer. A
2:09 paristalysis. Right arrow. Explanation.
2:11 Muscular contractions push food along
2:14 the digestive tract.
2:19 Six. The basic unit of life is A organ,
2:24 B organ system, C cell, D tissue.
2:27 Check mark correct answer. C cell right
2:30 arrow explanation. Cell is the
2:34 structural and functional unit of life.
2:38 Seven. In humans, the exchange of gases
2:42 takes place in the A. Broni, B. Alvoli
2:46 C. trachea D. Farnings.
2:49 Check mark correct answer. B. Alvoli
2:52 right arrow. Explanation. Alvoli are
2:54 thin walled and surrounded by
2:57 capillaries for gas exchange.
3:00 Eight. The process of removal of wastes
3:04 from the body is called A. Respiration,
3:08 B. Excretion, C digestion, D reproduction.
3:10 reproduction.
3:13 Check mark. Correct answer B. Excretion
3:16 right arrow explanation. Excretion
3:20 removes harmful metabolic wastes.
3:23 Nine. Which structure prevents food from
3:27 entering the windpipe? A. Larynx. B.
3:32 Epiglotus. C. Farings. D. Alvoli.
3:34 Check mark. Correct answer. B.
3:37 Epiglotus. Right arrow. Explanation.
3:40 Epiglotus covers the trachea during swallowing.
3:41 swallowing.
3:45 10. What is the first enzyme that acts
3:49 on food in the human digestive system?
3:55 A. Pepsin. B. TSON. C. Ama. D. Lipase.
3:58 Check mark. Correct answer. C. Aalayise.
4:01 Right arrow. Explanation. Salivary
4:03 amalayise breaks down starch in the mouth.
4:05 mouth.
4:09 11. Plants absorb water through A
4:15 flowers, B roots, C leaves, D stem.
4:18 Check mark. Correct answer. B roots.
4:21 Right arrow. Explanation. Roots have
4:24 root hairs that absorb water.
4:28 12. The functional unit of the kidney is
4:33 A. Alvolus, B nephron, C neuron, D capillary.
4:35 capillary.
4:38 Check mark. Correct answer. B. Nephron.
4:40 Right arrow. Explanation. Nephron
4:44 filters blood and forms urine.
4:47 13. Which pigment traps sunlight during photosynthesis?
4:49 photosynthesis?
4:53 A. Hemoglobin. B. Melanin. C.
4:56 Chlorophyll. D. Keratin.
4:58 Check mark. Correct answer. C.
5:01 Chlorophyll. Right arrow. Explanation.
5:03 Chlorophyll absorbs sunlight for photosynthesis.
5:06 photosynthesis.
5:10 14. The excretory product of humans is
5:16 A. Carbon dioxide, B. Oxygen, C. URA, D. Glucose.
5:18 Glucose.
5:21 Check mark. Correct answer. C. URA.
5:24 Right arrow. Explanation. URA is formed
5:28 in the liver from breakdown of proteins.
5:31 15. The double wall sack around the
5:36 heart is called A pericardium, B plura,
5:40 C mining, D sinovial membrane.
5:43 Check mark correct answer. A par
5:46 pericardium right arrow. Explanation.
5:48 Paricardium protects and lubricates the heart.
5:50 heart.
5:55 16. Stoer are found mainly on the A.
5:59 Roots. B. Lower surface of leaves. C.
6:03 Stem bark. D. Flower petals.
6:06 Check mark. Correct answer. B. Lower
6:08 surface of leaves. Right arrow.
6:11 Explanation. Stoometer. Allow gas
6:13 exchange in leaves.
6:17 17. The process of obtaining energy from
6:22 food is a digestion, b excretion, c
6:26 respiration, d assimulation. Check mark.
6:29 Correct answer. C. Respiration. Right
6:32 arrow. Explanation. Respiration releases
6:35 energy from food.
6:40 18. Fat digestion begins in th A. Mouth.
6:44 B. Stomach. C. Small intestine. D. Large intestine.
6:46 intestine.
6:49 Check mark. Correct answer. C. Small
6:52 intestine. Right arrow. Explanation.
6:54 Bile and lipase act in the small intestine.
6:56 intestine.
7:00 19. In plants, excess water is removed
7:06 by A transpiration, B photosynthesis, C
7:09 respiration, Digestion.
7:12 Check mark correct answer. A
7:15 transpiration. Right arrow. Explanation.
7:17 Transpiration releases water vapor
7:20 through stoometer.
7:24 20. The human respiratory pigment is A.
7:28 Chlorophyll, B. Hemoglobin, C. Melanin,
7:31 D. Myoglobin.
7:33 Check mark. Correct answer. B.
7:36 Hemoglobin. Right arrow. Explanation.
7:40 Hemoglobin carries oxygen in blood.
7:43 21. Which blood vessel carries
7:47 oxygenrich blood from lungs to heart? A.
7:51 Pulmonary vein. B. Pulmonary artery. C.
7:54 Wiener cover. D. Aort.
7:57 Check mark. Correct answer. A. Pulmonary
8:00 vein. Right arrow. Explanation.
8:03 Pulmonary vein brings oxygenated blood
8:05 to the heart.
8:09 22. Autotrophic nutrition means A.
8:13 Eating other animals. B. Preparing food
8:16 from inorganic substances. C. Eating
8:20 only fruits. D. Living in water.
8:23 Check mark. Correct answer. B. Preparing
8:26 food from inorganic substances. Right
8:29 arrow explanation. Autoroes make their
8:32 own food using sunlight.
8:36 23. Pepsin is active in A. Acidic
8:40 medium, B. Basic medium, C neutral
8:44 medium, D dry medium.
8:47 Check mark. Correct answer. A. Acidic
8:50 medium. Right arrow. Explanation. Pepsin
8:53 needs HCl to function.
8:57 24. The enzyme that converts glucose to
9:00 pyrovate is involved in A.
9:04 Photosynthesis, B. Glycolysis, C. Krebs
9:09 cycle, D electron transport chain. Check
9:12 mark. Correct answer. B. Glycolysis.
9:15 Right arrow. Explanation. Glycolysis
9:19 breaks down glucose to pyrovate.
9:23 25. The liquid part of blood is called
9:28 A. Platelets, B. Plasma, C RBC's,
9:31 D WBCS.
9:34 Check mark. Correct answer. B. Plasma.
9:38 Right arrow. Explanation. Plasma carries
9:41 dissolved substances.
9:44 26. The vein that brings blood from the
9:47 lower body to the heart is
9:51 A pulmonary artery, B superior vener
9:54 cover, C inferior vener cover, D
9:57 coronary vein.
10:00 Check mark correct answer C inferior
10:03 vener cover. Right arrow explanation
10:06 inferior vener cover drains blood from
10:08 lower parts.
10:11 27. The organ where absorption of
10:15 digested food takes place. A large
10:20 intestine. B small intestine. C stomach.
10:23 D esophagus. Check mark. Correct answer.
10:26 B small intestine. Right arrow.
10:29 Explanation. Willy in small intestine
10:32 absorb nutrients.
10:36 28. Blood in arteries is generally A
10:41 deoxxygenated, B oxygenated, C impure, D
10:44 without plasma.
10:47 Check mark correct answer. B oxygenated.
10:50 Right arrow. Explanation. Arteries carry
10:53 oxygenrich blood except pulmonary artery.
10:55 artery.
10:59 29. Breathing rate increases during
11:02 exercise because A body needs less
11:08 oxygen. Body produces more CO. C blood
11:11 pressure decreases. Digestion slows down.
11:13 down.
11:16 Check mark correct answer. B. Body
11:18 produces more CO. Right arrow.
11:21 Explanation. Co levels rise during
11:24 exercise increasing breathing.
11:28 30. Photosynthesis takes place in the
11:32 presence of a darkness, b sunlight, c
11:36 air pollution, d cold temperature.
11:40 Check mark correct answer, b sunlight.
11:43 Right arrow explanation. Light energy is
11:46 essential for photosynthesis.
11:51 31. The human excretory system includes
11:55 A heart and blood vessels, B kidneys and
11:58 urinary bladder, C brain and spinal
12:01 cord, D skin and hair. Check mark
12:05 correct answer. B kidneys and urinary
12:08 bladder. Right arrow explanation. These
12:11 organs filter and store urine.
12:14 32. Which is not a product of respiration?
12:16 respiration?
12:20 A. Water. B. Carbon dioxide. C. Oxygen.
12:22 D. Energy.
12:26 Check mark. Correct answer. C. Oxygen.
12:29 Right arrow. Explanation. Oxygen is
12:33 consumed not produced in respiration.
12:38 33. Plant respiration occurs. A only at
12:42 night. B only in sunlight. C. All the
12:45 time. D only when watered.
12:48 Check mark. Correct answer. See all the
12:51 time. Right arrow. Explanation.
12:55 Respiration happens continuously.
12:59 34. Which is a digestive gland? A.
13:05 Kidney. B. Liver. C. Heart. D. Lungs.
13:08 Check mark. Correct answer. B. Liver.
13:11 Right arrow. Explanation. Liver secretes
13:14 bile for fat digestion.
13:18 35. Which organ stores bile? A. Liver.
13:24 B. Kidney. C. Gall bladder. D. Spleen.
13:27 Check mark. Correct answer. C. Gallb
13:30 bladder. Right arrow. Explanation. Gallb
13:33 bladder stores bile from the liver. 36.
13:35 36.
13:38 Glucose is stored in the liver as a
13:44 protein, b fat, c glycogen, d cellulose.
13:48 Check mark. Correct answer. C. Glycogen.
13:51 Right arrow. Explanation. Glycogen is
13:54 the storage form of glucose.
13:59 37. Willie are found in the A. Stomach.
14:03 B. Small intestine. C. Large intestine.
14:05 D. Lungs.
14:08 Check mark. Correct answer. B. Small
14:11 intestine. Right arrow. Explanation.
14:14 Will he increase surface area for absorption?
14:16 absorption?
14:19 38. Which transports oxygen in human
14:23 blood? A WBC
14:28 B. Plasma C. Platelets D RBC.
14:32 Check mark. Correct answer. D RBC. Right
14:36 arrow. Explanation. Hemoglobin in RBC's
14:38 carries oxygen.
14:43 39. Broni are branches of thigh. A
14:47 esophagus, B trachea, C stomach, D
14:51 heart. Check mark correct answer. B
14:55 trachea right arrow. Explanation. Bronai
14:58 carry air into lungs.
15:01 40. Which process uses sunlight for
15:05 making food? A. Respiration. B.
15:08 Photosynthesis. C. Excretion. D. Digestion.
15:10 Digestion.
15:13 Check mark. Correct answer. B.
15:15 Photosynthesis. Right arrow.
15:18 Explanation. Photosynthesis uses solar energy.
15:20 energy.
15:24 41. The process of filtration in kidneys
15:28 is called A. Transpiration, B excretion,
15:33 C ultrailtration, D perspiration.
15:36 Check mark. Correct answer, C
15:39 ultrailtration. Right arrow explanation.
15:41 Blood is filtered under pressure in the
15:45 glomeialis called ultrailtration.
15:48 42. Which chamber of the heart pumps
15:52 blood to the lungs? A. Left atrium. B.
15:56 Right atrium. C. Left ventricle. D.
15:58 Right ventricle.
16:01 Check mark. Correct answer. D. Right
16:04 ventricle. Right arrow. Explanation.
16:07 Right ventricle pumps de oxygenated
16:09 blood to the lungs via the pulmonary artery.
16:11 artery.
16:14 43. Which blood component helps in
16:18 clotting? A rc's
16:20 B. WBC's
16:24 C. Platelets D. Plasma.
16:26 Check mark. Correct answer. C.
16:29 Platelets. Right arrow. Explanation.
16:32 Platelets release chemicals to help
16:34 blood clot.
16:37 44. What is the function of xyllem in
16:42 plants? A. Transport food. B. Transport
16:45 water. C. Reproduction. D. Photosynthesis.
16:47 Photosynthesis.
16:50 Check mark. Correct answer. B. Transport
16:54 water. Right arrow. Explanation. Xylm
16:56 carries water and minerals from roots to leaves.
16:58 leaves.
17:01 45. Which part of the human brain
17:03 controls breathing?
17:08 A cerebellum B modella oblongata C
17:12 cerebrum D hypothalamus
17:15 check mark correct answer B medela
17:18 oblong right arrow explanation mela
17:21 controls involuntary actions like breathing
17:22 breathing
17:27 46 fat digesting enzyme is called a
17:33 amalayise b lipase c pepsin drison
17:36 Check mark. Correct answer. B. Lipase.
17:39 Right arrow. Explanation. Lipase breaks
17:44 down fats into fatty acids and glycerol. 47.
17:45 47.
17:49 Plants lose water mainly through A.
17:52 Transpiration, B. Respiration, C
17:56 gutation, D diffusion.
17:58 Check mark. Correct answer. A.
18:01 Transpiration. Right arrow. Explanation.
18:04 Water vapor escapes through stoometer in transpiration.
18:06 transpiration.
18:10 48. Which is the opening for air passage
18:12 in insects?
18:17 A. Spirals. B. Strometer. C. Lent cells.
18:19 D. Gills.
18:22 Check mark. Correct answer. A. Spirals.
18:25 Right arrow. Explanation. Spirals are
18:28 small openings on insect bodies for gas exchange.
18:30 exchange.
18:35 49. The green pigment in leaves is A.
18:40 Keratene, B chlorophyll, C zanthophil, D anthocyanin.
18:42 anthocyanin.
18:44 Check mark correct answer. B
18:47 chlorophyll. Right arrow. Explanation.
18:49 Chlorophyll gives leaves their green
18:52 color and traps sunlight.
18:57 50. An aerobic respiration occurs in a
19:00 presence of oxygen. B. Presence of
19:04 light. C. Absence of oxygen. D. Presence
19:05 of water.
19:09 Check mark. Correct answer. C. Absence
19:12 of oxygen. Right arrow. Explanation. An
19:14 aerobic respiration does not require
19:18 oxygen and produces less energy.
19:21 51. What is the structural and
19:24 functional unit of the kidney? A.
19:28 Neuron. B. Alvolus. C. Nefron. D. Glomialis.
19:30 Glomialis.
19:34 Check mark. Correct answer. C. Nefron.
19:36 Right arrow. Explanation. Nephrons
19:38 filter blood and form urine in the kidneys.
19:40 kidneys.
19:44 52. Which process releases energy from glucose?
19:45 glucose?
19:49 A. Digestion. B. Respiration. C.
19:53 Excretion. D. Reproduction.
19:55 Check mark. Correct answer. B.
19:58 Respiration. Right arrow. Explanation:
20:01 Respiration breaks down glucose to
20:03 release energy.
20:07 53 The small paws on the leaf surface
20:11 are called A. Willie, B. Stoometer, C
20:15 spirals, D lentic cells.
20:18 Check mark correct answer. B stoometer.
20:21 Right arrow. Explanation. Stoometer help
20:25 in gas exchange in leaves.
20:28 54. Which is not a part of the human
20:33 elementary canal? A stomach. B kidney. C
20:38 esophagus. D small intestine.
20:41 Check mark correct answer. B kidney.
20:43 Right arrow. Explanation. Kidneys are
20:47 excretory organs not digestive.
20:52 55. Bile juice is produced in A
20:56 pancreas, B liver, C gall bladder, D kidney.
20:58 kidney.
21:01 Check mark correct answer. B liver right
21:05 arrow explanation. Liver produces bile
21:08 which helps in fat digestion.
21:12 56. The main function of hemoglobin is
21:18 to A digest proteins, B carry oxygen, C
21:22 produced bile, D store food. Check mark
21:26 correct answer B carry oxygen. Right
21:29 arrow explanation. Hemoglobin binds with
21:32 oxygen in RBCs.
21:35 57. The inner lining of the stomach
21:40 secretes A. Pepsin, B. Bile, C. Insulin,
21:43 D. Saliva.
21:46 Check mark. Correct answer. A. Pepsin.
21:49 Right arrow. Explanation. Pepsin digests
21:52 proteins in acidic medium.
21:56 58. The site of arabic respiration in
22:01 cells is a chloroplast, bucleus,
22:06 c mitochondria, dg body. Check mark.
22:09 Correct answer. C. Mitochondria right
22:12 arrow explanation. Mitochondria are
22:16 called the powerhouses of the cell.
22:20 59. The excretary product in plants may
22:25 include A. Oxygen, B. Gum, C. Glucose,
22:29 D. Protein. Check mark. Correct answer.
22:32 B. Gum. Right arrow. Explanation. Plants
22:37 store wastes as gums. Resence. ETC.
22:41 60. The process of breakdown of food in
22:46 the body is A digestion, B excretion, C
22:50 respiration, D photosynthesis.
22:53 Check mark correct answer. A digestion.
22:56 Right arrow. Explanation. Digestion
23:00 converts food into simpler substances.
23:06 61. Fat digestion needs. A. Saliva. B.
23:10 Hydrochloric acid. C. Bile salts. D. Insulin.
23:11 Insulin.
23:14 Check mark. Correct answer. C. Bile
23:18 salts. Right arrow. Explanation. Bile
23:21 emulsifies fats for digestion.
23:24 62. The pigment responsible for green
23:29 color in plants is A. Hemoglobin, B.
23:33 Chlorophyll, C. Keratin, D. Melanin.
23:36 Check mark. Correct answer B.
23:39 Chlorophyll. Right arrow. Explanation.
23:41 Chlorophyll absorbs light for photosynthesis.
23:43 photosynthesis.
23:48 63. Water moves through plant roots by
23:52 A. Diffusion. B. Osmosis. C. Active
23:55 transport. D. Excretion.
23:59 Check mark. Correct answer. B. Osmosis.
24:02 Right arrow. Explanation. Water enters
24:05 root cells via osmosis.
24:10 64. Which organ filters blood in humans?
24:14 A. Lungs. B. Heart. C. Kidneys. D. Pancreas.
24:16 Pancreas.
24:19 Check mark. Correct answer. C. Kidneys.
24:23 Right arrow. Explanation. Kidneys remove
24:25 waste from blood.
24:29 65. The process of intake of food is
24:33 called A digestion, B igestion, C
24:36 ingestion, D excretion.
24:40 Check mark correct answer. C ingestion.
24:42 Right arrow. Explanation. Ingestion
24:46 means taking food into the body.
24:50 66. The rhythmic contraction of muscles
24:53 in elementary canal is called A.
24:58 Excretion, B. digestion. C. Paristalsis,
25:00 D. Absorption. Check mark. Correct
25:04 answer. C. Paristalis. Right arrow.
25:06 Explanation. Paristalysis pushes food
25:09 through the digestive tract.
25:15 67. The enzyme present in saliva is A.
25:19 Pepsin, B. Lipase, C amlayise, D. Lactase.
25:21 Lactase.
25:24 Check mark. Correct answer. C. Ama.
25:27 Right arrow explanation amalayise digest
25:30 starch in the mouth.
25:34 68. In humans, the lungs are present in
25:38 th A. Abdominal cavity. B. Thoracic
25:42 cavity. C. Cranial cavity. D. Pelvic cavity.
25:44 cavity.
25:47 Check mark. Correct answer. B. Thoracic
25:50 cavity. Right arrow. Explanation. Lungs
25:53 are located in the chest.
25:57 69. Transpiration helps in A food
26:01 production, B cooling the plant, C
26:04 photosynthesis, D excretion.
26:08 Check mark correct answer B cooling the
26:11 plant. Right arrow. Explanation. Water
26:14 loss helps cool the plant.
26:18 70. Carbon dioxide as a waste product of
26:22 A. Photosynthesis, B. Respiration. C.
26:26 Excretion. D. Digestion.
26:28 Check mark. Correct answer. B.
26:31 Respiration. Right arrow. Explanation.
26:35 Respiration releases. CO is waste.
26:39 71. The main product of photosynthesis
26:45 is A. Oxygen B. Carbon dioxide C glucose
26:47 D water.
26:51 Check mark. Correct answer. C. Glucose
26:54 right arrow explanation. Glucose stores
26:57 energy for the plant.
27:01 72. The trachea divides into two. A
27:07 bronchai B alvoli C larynx D willie.
27:10 Check mark. Correct answer. A. Bronai
27:13 right arrow. Explanation. Bronai carry
27:16 air to each lung.
27:20 73. The function of platelets is A
27:25 immunity, B oxygen transport, C clotting
27:28 of blood, Digestion.
27:31 Check mark correct answer C clotting of
27:34 blood. Right arrow. Explanation.
27:36 Platelets form clots to prevent bleeding.
27:37 bleeding.
27:42 74. Which organ stores bile temporarily?
27:47 A. Liver. B. Pancreas. C. G bladder. D. Kidney.
27:49 Kidney.
27:52 Check mark. Correct answer. C. Gallb
27:54 bladder. Right arrow. Explanation.
27:58 Gallbladder stores bile until needed.
28:04 75. Photosynthesis occurs in A roots, B
28:08 leaves, C bark, D flowers.
28:12 Check mark. Correct answer. B leaves.
28:15 Right arrow. Explanation. Leaves contain
28:18 chlorophyll for photosynthesis. 76.
28:20 76.
28:24 An aerobic respiration produces A. More
28:27 energy than Arabic. B. Equal energy is
28:31 Arabic. C. Less energy than Arabic. D.
28:33 No energy.
28:36 Check mark. Correct answer. C. Less
28:40 energy Arabic. Right arrow. Explanation.
28:44 Anerobic is less efficient than Arabic. 77.
28:46 77.
28:49 Waste materials in plants may be stored
28:53 in A. Vacules, B mitochondria, C
28:58 chloroplast, D. G apparatus.
29:01 Check mark correct answer. A vacules
29:04 right arrow. Explanation. Vacuoles store
29:07 wastes in plant cells.
29:12 78. Which is not a component of blood?
29:20 A. plasma B R C C W B C D neuron
29:23 check mark correct answer D neuron right
29:27 arrow explanation neuron is a nerve cell
29:29 not part of blood
29:34 79 plants transport food through a
29:40 xyllem B flim c root hair D stoometer
29:43 check mark correct Answer B. Phm right
29:47 arrow. Explanation. Phm carries food substances.
29:49 substances.
29:53 80. The large intestine mainly absorbs.
29:58 A. Glucose. B. Water. C. Fatty acids. D. Vitamins.
30:00 Vitamins.
30:03 Check mark. Correct answer. B. Water.
30:06 Right arrow. Explanation. Large
30:10 intestine reabsorbs water from waste.
30:14 81. The voice box is also called A
30:19 trachea, B bronchi, C larynx, D alvololis.
30:21 alvololis.
30:24 Check mark correct answer. C larynx
30:27 right arrow explanation. Larynx contains
30:30 vocal cords.
30:35 82. The energy currency of the cell is A
30:42 D N A B A TP C R N A D enzyme.
30:46 Check mark. Correct answer. B AP Right
30:49 arrow explanation. ATP stores and
30:51 supplies energy.
30:55 83. The pigment responsible for red
30:58 color in blood is A. Melanin, B.
31:03 Hemoglobin C. Chlorophyll D. Keratin.
31:06 Check mark. Correct answer. B.
31:09 Hemoglobin. Right arrow. Explanation.
31:12 Hemoglobin binds oxygen and gives red color.
31:13 color.
31:18 84. Excretion in amoeba occurs through
31:22 A. Mouth. B. Contractile vacule. C.
31:26 Gills. D. Spirals. Check mark. Correct
31:29 answer. B. Contractile vacule right
31:32 arrow explanation. Amoeba uses
31:36 contractile vacule to expel waste.
31:39 85. The tube connecting mouth to stomach
31:45 is a trachea. B. Esophagus. C. Farnings.
31:47 D. Broncus.
31:50 Check mark. Correct answer. B.
31:53 Esophagus. Right arrow. Explanation.
31:56 Essophagus carries food to the stomach.
32:01 86. The pulmonary artery carries a
32:05 oxygenated blood, B deoxxygenated blood,
32:10 C plasma, Digested food. Check mark
32:14 correct answer. B. Deoxxygenated blood.
32:16 Right arrow. Explanation. Pulmonary
32:18 artery carries blood to lungs for oxygenation.
32:21 oxygenation.
32:26 87. Blood flows from atria to A. Veins,
32:31 B arteries, C ventricles, D alvoli.
32:35 Check mark correct answer. C ventricles.
32:38 Right arrow. Explanation. Blood passes
32:41 from atria to ventricles.
32:45 88. The enzyme that digests proteins in
32:51 stomach is a lipase, b pepsin, c amma, d lactase.
32:53 lactase.
32:56 Check mark correct answer. B pepsin.
32:59 Right arrow. Explanation. Pepsin digests
33:02 proteins in acidic medium.
33:06 89. The longest part of the elementary
33:10 canal is a. Eophagus. B. Large
33:14 intestine. C. Small intestine, D. Stomach.
33:16 Stomach.
33:19 Check mark. Correct answer. C. Small
33:22 intestine. Right arrow. Explanation.
33:25 Small intestine is the longest about 6 m long.
33:27 long.
33:31 90. The main function of lungs is a
33:36 digestion, b excretion of ura, c gas
33:40 exchange, d blood production.
33:43 Check mark. Correct answer. C. Gas
33:45 exchange. Right arrow. Explanation.
33:48 Lungs exchange oxygen and carbon dioxide.
33:50 dioxide.
33:55 91. Gills are respiratory organs in A.
34:01 Frogs. B. Birds. C. Fishes. D. Humans.
34:04 Check mark. Correct answer. C. Fishes.
34:07 Right arrow. Explanation. Gills. Extract
34:10 the oxygen from water.
34:14 92. The heart has how many chambers?
34:20 A 2 B 4 C 3 D1.
34:23 Check mark. Correct answer. B4. Right
34:26 arrow. Explanation. Human heart has two
34:29 atria and two ventricles.
34:34 93. The lungs are spongy because of A
34:39 air sacks, B blood vessels, C nerves, D cartilage.
34:41 cartilage.
34:44 Check mark. Correct answer. A air sacks.
34:47 Right arrow. Explanation. Alvoli give
34:50 lungs a spongy texture.
34:54 94. The major waste gas excreted during
35:00 respiration is A nitrogen, B oxygen, C
35:04 carbon dioxide, D hydrogen.
35:07 Check mark correct answer C carbon
35:10 dioxide. Right arrow explanation. Core
35:12 is the primary waste product of respiration.
35:14 respiration.
35:19 95. The lungs open to the outside wire.
35:24 A. Esophagus. B. Trachea. C. Stomach. D. Diaphragm.
35:26 Diaphragm.
35:29 Check mark. Correct answer. B. Trachea.
35:31 Right arrow. Explanation. Trachea
35:35 conducts air to and from lungs.
35:39 96. Blood is pumped to the body from A
35:43 left ventricle, B right ventricle, C
35:48 left atrium, D right atrium.
35:50 Check mark. Correct answer. A left
35:54 ventricle right arrow explanation left
35:56 ventricle pumps oxygenated blood to body.
35:58 body.
36:02 97 The end product of digestion of
36:07 carbohydrates is a amino acids b fatty
36:12 acids c glucose d vitamins.
36:15 Check mark correct answer c glucose
36:18 right arrow explanation. Carbohydrates
36:22 break down into glucose.
36:26 98. Respiration in humans takes place in
36:32 A lungs, B liver, C kidney, D spleen.
36:35 Check mark correct answer. A lungs.
36:39 Right arrow. Explanation. Lungs exchange
36:42 gases for respiration.
36:45 99. Blood vessels which carry blood away
36:50 from the heart are A veins B arteries C
36:54 capillaries D alvoli
36:57 check mark correct answer B arteries
37:00 right arrow explanation arteries carry
37:03 blood from heart to organs
37:08 100 plants excrete oxygen during A
37:12 digestion B respiration C photosynthesis
37:15 D. Transpiration.
37:18 Check mark. Correct answer. C.
37:20 Photosynthesis. Right arrow.
37:23 Explanation. Oxygen is a byproduct of photosynthesis.
37:26 photosynthesis. 101.
37:27 101.
37:30 The main waste product formed in human
37:36 urine is a glucose, b oxygen, c ura, d
37:38 lactic acid.
37:42 Check mark. Correct answer. C ura. Right
37:45 arrow explanation. URA is formed in the
37:49 liver from the breakdown of amino acids.
37:53 102. Which blood vessel has valves to
37:57 prevent backflow? A. Artery. B. Wayne
38:01 vein. C. Capillary. D. Aort.
38:04 Check mark. Correct answer. B. Wayne.
38:07 Right arrow. Explanation. Wes have
38:09 valves to prevent blood flowing backward.
38:11 backward. 103.
38:13 103.
38:16 The smallest blood vessels are called A
38:21 veins, B arteries, C capillaries, D bronchi.
38:22 bronchi.
38:26 Check mark correct answer. Capillaries
38:29 right arrow. Explanation. Capillaries
38:31 are thin and allow exchange of substances.
38:33 substances.
38:39 104. The enzyme trison acts on A fats, B
38:44 proteins, C carbohydrates, D water.
38:47 Check mark correct answer. B proteins.
38:50 Right arrow. Explanation. Trison digests
38:54 proteins in the small intestine. 105.
38:56 105.
38:59 The function of the diaphragm is true. A
39:04 digest food. B pump blood. C help in
39:08 breathing. D filter blood. Check mark.
39:11 Correct answer. C. Help in breathing.
39:14 Right arrow. Explanation. Diaphragm
39:16 contracts and relaxes to move air in and
39:19 out of lungs. 106.
39:21 106.
39:25 Oxygenated blood flows from lungs to A
39:29 right atrium, B left atrium, C right
39:32 ventricle, D liver.
39:35 Check mark correct answer. B left
39:37 atrium, right arrow. Explanation.
39:41 Pulmonary veins carry oxygenrich blood
39:43 into left atrium. 107.
39:45 107.
39:49 Photosynthesis mainly takes place in A
39:54 stem bark b root hairs c mephil cells D xyllem
39:56 xyllem
40:00 check mark correct answer C meifil cells
40:03 right arrow explanation mephil cells
40:06 contain chloroplasts 108
40:08 108
40:11 the fluid part of blood is called a
40:15 lymph b plasma c platelets D. Hemoglobin.
40:17 Hemoglobin.
40:20 Check mark. Correct answer. B. Plasma.
40:24 Right arrow. Explanation. Plasma carries
40:27 dissolved substances.
40:32 109. The function of kidneys is two. A.
40:36 Digest food. B. Pump blood. C. Filter
40:40 blood. D. Produce oxygen. Check mark.
40:43 Correct answer. C. Filter blood. Right
40:45 arrow. Explanation: Kidneys remove
40:49 wastes and maintain water balance.
40:54 110. Plant roots absorb minerals by A.
40:58 Photosynthesis, B. Excretion, C. A
41:02 active transport, D respiration.
41:05 Check mark. Correct answer. C. Active
41:08 transport. Right arrow. Explanation.
41:11 Roots actively absorb minerals against
41:14 concentration gradient. 111.
41:16 111.
41:20 The lungs contain tiny sacks called A
41:26 Broni, B alvoli, C willie, D nephrons.
41:29 Check mark correct answer. B alvoli
41:32 right arrow. Explanation. Alvoli are
41:36 sightes of gas exchange in lungs.
41:41 112. The enzyme pepsin digests. A. Fats.
41:47 B. Carbohydrates, C proteins, D. Water.
41:50 Check mark. Correct answer. C. Proteins.
41:53 Right arrow. Explanation. Pepsin breaks
41:57 proteins into peptides in the stomach. 113.
41:59 113.
42:02 An aerobic respiration in muscles
42:07 produces a alcohol, b oxygen, c lactic
42:10 acid, d chlorophyll.
42:13 Check mark. Correct answer C. Lactic
42:16 acid. Right arrow. Explanation. Lactic
42:20 acid causes muscle fatigue. 114.
42:22 114.
42:26 Hemoglobin is found in A. Plasma B.
42:29 Platelets. C. WBC's
42:32 D. RBC's.
42:36 Check mark. Correct answer. D RBC's.
42:39 Right arrow. Explanation. RBC's carry
42:43 hemoglobin for oxygen transport. 115.
42:45 115.
42:48 The pulmonary vein carries blood to A.
42:54 Lungs. B. Brain. C. Heart. D. Liver.
42:57 Check mark. Correct answer. C. Heart.
43:00 Right arrow. Explanation. Pulmonary vein
43:04 brings blood from lungs to heart. 116.
43:05 116.
43:10 Plants use water for A only support, B
43:13 photosynthesis and transport, C
43:17 producing proteins only, D excretion.
43:19 Check mark correct answer B
43:22 photosynthesis and transport. Right
43:25 arrow explanation. Water is essential in
43:29 photosynthesis and moving substances. 117.
43:31 117.
43:35 The elementary canal begins with the A.
43:40 Stomach, B esophagus, C mouth, D small intestine.
43:42 intestine.
43:45 Check mark correct answer. C mouth.
43:48 Right arrow. Explanation. Digestion
43:51 starts in the mouth. 118.
43:53 118.
43:58 WBC's function to A. carry oxygen, B
44:02 produce hormones, C fight infections, D
44:05 form blood clots.
44:08 Check mark correct answer. C fight
44:11 infections. Right arrow explanation.
44:15 WBC's are part of immune system. 119.
44:17 119.
44:21 Water lost by plants evaporates through
44:25 A. Root hairs. B. Willie. C. Stometer.
44:27 D. Trickier.
44:31 Check mark. Correct answer. C. Stormter.
44:34 Right arrow. Explanation. Stormter.
44:38 Allow water vapor to escape.
44:42 120. The digestion of starch starts in
44:46 the A. Stomach. B. Mouth. C. Small
44:50 intestine. D large intestine.
44:53 Check mark. Correct answer. B. Mouth.
44:57 Right arrow. Explanation: Salivary AMAs
45:06 121. The wall of human heart is made of
45:10 A. Cartilage, B. Fat, C. Muscular
45:14 tissue, D. Bone. Check mark. Correct
45:17 answer. C. Muscular tissue. Right arrow.
45:20 Explanation. Heart is made of cardiac muscles.
45:28 122 exhaled air has more. A oxygen B
45:34 carbon dioxide C nitrogen D hydrogen
45:37 check mark correct answer B carbon
45:40 dioxide Right arrow explanation
45:46 123
45:50 In plants sugars are transported through
45:56 A Xylm B phem C roots D stoometer
45:59 Check mark. Correct answer. B. Phm.
46:03 Right arrow. Explanation. Flom carries
46:07 food to plant parts. 124.
46:08 124.
46:12 URA is formed in the A. Kidney. B.
46:16 Liver. C. Stomach. D. Lungs.
46:19 Check mark. Correct answer. B. Liver.
46:23 Right arrow. Explanation. Liver changes
46:26 ammonia to ura. 125.
46:28 125.
46:30 The valve between left atrium and
46:35 ventricle is A triricuspor B mital
46:40 bicusper C semile luna D pulmonary
46:43 check mark correct answer B mital
46:47 bicusper right arrow explanation mitral
46:52 valve prevents backflow of blood 126
46:53 126
46:58 Oxygen enters the blood in a bronchi B.
47:02 Trickier. C. Alvoli. D. Larynx.
47:06 Check mark. Correct answer. C. Alvoli.
47:09 Right arrow. Explanation. Alvoli
47:15 127.
47:19 Excretion. Helps maintain a blood sugar,
47:23 b hormones, c body temperature, d
47:26 internal environment. Check mark.
47:29 Correct answer. D. Internal environment.
47:31 Right arrow. Explanation. Excretion
47:41 128. Plants store extra glucose as A.
47:45 Protein. B. Glycogen. C. Star starch. D. Fats.
47:47 Fats.
47:49 Check mark. Correct answer. C. Star
47:53 starch. Right arrow. Explanation. Plants
47:59 129
48:02 which is not a life process. A
48:05 respiration, B excretion, C
48:09 photosynthesis, D sleeping.
48:12 Check mark correct answer, D sleeping.
48:15 Right arrow explanation. Sleeping is
48:24 130. Bronchi divide into smaller tubes
48:28 called A trachea, B alvoli, C
48:32 bronchioles, D will check mark correct
48:36 answer. C bronchioles right arrow.
48:39 Explanation bronchioles further branch
48:44 131.
48:47 Blood from body enters the heart and A
48:51 left atrium, B right atrium, C left
48:55 ventricle, D right ventricle.
48:58 Check mark correct answer. B right
49:01 atrium right arrow. Explanation right
49:06 atrium collects deoxxygenated blood. 132
49:07 132
49:10 Small projections in intestines are
49:16 called a stoometer B. Willie C. Alvoli D spirals
49:18 spirals
49:21 check mark correct answer B. Willie
49:24 Right arrow explanation will increase
49:32 133. The byproduct of anorobic
49:37 respiration in yeast is a lactic acid b
49:41 oxygen c alcohol d ura.
49:45 Check mark. Correct answer. C. Alcohol.
49:48 Right arrow. Explanation. Yeast produces
49:54 134.
49:59 Bile makes fats easier to digest by A.
50:02 Breaking into glycerol. B. Forming
50:06 myels. C. Forming proteins. D. None of these.
50:07 these.
50:10 Check mark. Correct answer. B. forming
50:14 myels. Right arrow. Explanation. Bile
50:20 135.
50:24 Hemoglobin has iron because it binds. A.
50:28 Water. B. Oxygen. C. Nitrogen. D. Glucose.
50:30 Glucose.
50:33 Check mark. Correct answer. B. Oxygen.
50:36 Right arrow. Explanation. Iron in
50:42 136
50:45 transllocation refers to A. Water
50:50 movement, B gas exchange, C movement of
50:53 food, D root growth.
50:56 Check mark correct answer. C. Movement
50:59 of food. Right arrow. Explanation.
51:04 Transllocation moves sugars via flowm. 37.
51:06 37.
51:08 The opening between oral cavity and
51:14 ferinx is a larynx, bp epiglotus, c
51:17 glotus, d or aura fernx.
51:20 Check mark correct answer d or ferinx
51:23 right arrow. Explanation or aura
51:27 connects mouth to throat. 138.
51:29 138.
51:33 Oxygen diffuses into blood because it is
51:37 a active process. B lower in blood than
51:40 air, C higher in blood than air, D
51:43 non-essential gas.
51:46 Check mark correct answer. B. Lower in
51:48 blood than air. Right arrow.
51:51 Explanation. Gases diffuse from high to
51:56 139.
52:00 Animals need energy for A only
52:04 digestion, B all activities, C sleeping
52:08 only, D breathing only. Check mark
52:12 correct answer. B all activities. Right
52:15 arrow explanation. Energy powers all
52:23 140. ATP stands for A addin
52:26 triphosphate, B adenosine triphosphate,
52:30 C amino triphosphate, D adenosine tetrahosphate.
52:32 tetrahosphate.
52:35 Check mark correct answer. B adenosine
52:38 triphosphate. Right arrow explanation.
52:43 ATP stores and provides energy.
52:48 141. Kidney stones are solid masses of A
52:52 proteins, B glucose, C minerals and
52:55 salts, D fats.
52:58 Check mark correct answer. C minerals
53:01 and salts. Right arrow explanation.
53:04 Stones are formed from calcium salts etc.
53:06 etc.
53:11 142. Plant roots absorb water mainly by
53:15 A diffusion, B osmosis, C active
53:19 pumping, D evaporation.
53:22 Check mark correct answer, B osmosis.
53:25 Right arrow explanation. Water moves
53:35 143. The organ producing insulin is A.
53:40 Liver, B. Kidney, C. Pancreas, D. Lung.
53:43 Check mark. Correct answer. C. Pancreas.
53:46 Right arrow. Explanation. Pancreas
53:51 144.
53:55 Fatty acids are absorbed into A. Blood
54:00 vessels, B nerves, C lymph vessels, D
54:04 heart. Check mark. Correct answer. C
54:07 lymph vessels right arrow explanation
54:14 145
54:18 the term assimulation means a
54:22 elimination of waste b intake of food c
54:26 use of nutrients in body d breathing
54:29 check mark correct answer c use of
54:32 nutrients in body right arrow
54:34 explanation assimil ation builds body tissues.
54:37 tissues. 146
54:39 146
54:44 ureita connects. A liver and kidney, B
54:47 heart and kidney, C kidney and bladder,
54:50 D lung and kidney.
54:53 Check mark correct answer. C. Kidney and
54:55 bladder. Right arrow. Explanation.
55:00 Uritus carry urine to bladder. 147.
55:02 147.
55:06 Lactic acid causes A muscle relaxation,
55:11 B muscle fatigue, C increased energy, D
55:13 more oxygen.
55:16 Check mark correct answer. B muscle
55:19 fatigue. Right arrow. Explanation.
55:22 Lactic acid builds up during anobic respiration.
55:29 148. Lymph is similar to plasma but
55:35 lacks. A. Water. B glucose C RBC's
55:37 D salts
55:41 check mark correct answer C RBC's right
55:45 arrow explanation lymph has WBC's but
55:51 149
55:56 the phm transports a water only b carbon
56:00 dioxide c food food materials d o oxygen
56:04 In check mark correct answer C. Food
56:07 materials right arrow. Explanation. Flom
56:12 distributes sugars from leaves.
56:14 150. The blood vessel bringing
56:18 oxygenated blood to heart muscle is a
56:22 pulmonary artery b coronary artery c
56:27 aort d inferior venina cava. Check mark.
56:30 Correct answer. B. Coronary artery.
56:33 Right arrow explanation. Coronary
56:38 arteries supply heart muscles.
56:42 151. The urinary bladder stores. A.
56:48 Enzymes. B. Blood. C. Urine. D. Sweat.
56:51 Check mark. Correct answer. C. Urine.
56:54 Right arrow. Explanation. The bladder
56:56 temporarily stores urine until it is excreted.
57:03 152. Water absorption in the large
57:07 intestine helps in A. Protein synthesis,
57:11 B energy production, C formation of
57:14 solid feces, D production of bile. Check
57:18 mark correct answer C formation of solid
57:21 feces. Right arrow. Explanation. Water
57:23 removal solidifies waste before excretion.
57:29 153. The energy released during
57:34 respiration is stored as a fat b protein cpp
57:36 cpp dna.
57:39 dna.
57:43 Check mark correct answer cp right
57:46 arrow. Explanation ATP stores energy for
57:54 154. The pigment in plants capturing
57:59 sunlight is A hemoglobin, B chlorophyll,
58:02 C melanin, D keratin.
58:05 Check mark correct answer. B
58:08 chlorophyll. Right arrow. Explanation.
58:10 Chlorophyll traps solar energy for photosynthesis.
58:19 155. Fat is emulsified by A. Trison, B.
58:24 Pepsin, C. Bile salts D. Amalayise.
58:27 Check mark. Correct answer. C. Bile
58:30 salts. Right arrow. Explanation. Bile
58:37 156.
58:41 Glucose is transported in plants via a
58:47 stoometer b x zylm c phim d roots.
58:50 Check mark. Correct answer. C phium.
58:54 Right arrow explanation. Phm carries
58:58 sugars to various parts of the plant. 157.
59:00 157.
59:03 The human heart pumps blood to the lungs
59:06 through the A. Pulmonary artery. B.
59:11 Aort. C. Coronary artery. D. Superior
59:13 venina carava.
59:16 Check mark. Correct answer. A. Pulmonary
59:19 artery. Right arrow. Explanation.
59:21 Pulmonary artery carries deoxxygenated
59:25 blood to lungs.
59:29 158 The process by which plants release
59:33 water vapor is A transllocation, B
59:37 respiration, C photosynthesis, D transpiration.
59:39 transpiration.
59:41 Check mark correct answer. D
59:44 transpiration. Right arrow explanation.
59:47 Plants lose water vapor through stoometer.
59:50 stoometer. 159.
59:51 159.
59:54 Which of these is an excretory organ in humans?
59:55 humans?
60:01 A. Pancreas. B. Kidney. C. Lungs. D. Stomach. Check mark. Correct answer. B.
60:04 Stomach. Check mark. Correct answer. B. Kidney. Right arrow. Explanation.
60:06 Kidney. Right arrow. Explanation. Kidneys filter wastes from the blood.
60:11 Kidneys filter wastes from the blood. 160. What is the end product of
60:14 160. What is the end product of digestion of proteins?
60:16 digestion of proteins? A. fatty acids. B amino acids, C
60:21 A. fatty acids. B amino acids, C glucose, D lactic acid.
60:24 glucose, D lactic acid. Check mark correct answer. B. Amino
60:27 Check mark correct answer. B. Amino acids. Right arrow. Explanation.
60:30 acids. Right arrow. Explanation. Proteins are broken down into amino
60:33 Proteins are broken down into amino acids.
60:36 acids. 161. The structural unit of lungs is the
60:40 161. The structural unit of lungs is the A. Bronus. B. Alvolus. C. Trachea. D.
60:45 A. Bronus. B. Alvolus. C. Trachea. D. Bronchule.
60:47 Bronchule. Check mark. Correct answer. B. Alvolus.
60:50 Check mark. Correct answer. B. Alvolus. Right arrow. Explanation. Alvoli
60:53 Right arrow. Explanation. Alvoli exchange gases with blood.
60:57 exchange gases with blood. 162. Gums and resins in plants are
61:01 162. Gums and resins in plants are examples of A. Minerals, B. Proteins, C
61:06 examples of A. Minerals, B. Proteins, C excretory products, D. Sugars.
61:10 excretory products, D. Sugars. Check mark. Correct answer. C. Excreary
61:13 Check mark. Correct answer. C. Excreary products. Right arrow. Explanation:
61:16 products. Right arrow. Explanation: Plants store waste as gums and resins.
61:21 Plants store waste as gums and resins. 163
61:22 163 Exhaled air has more A. Oxygen, B.
61:26 Exhaled air has more A. Oxygen, B. Nitrogen, C. Carbon dioxide, D.
61:30 Nitrogen, C. Carbon dioxide, D. Chlorophyll.
61:32 Chlorophyll. Check mark. Correct answer. C. Carbon
61:35 Check mark. Correct answer. C. Carbon dioxide. Right arrow. Explanation.
61:38 dioxide. Right arrow. Explanation. Co-increases after respiration.
61:44 164. The part of brain controlling
61:46 The part of brain controlling involuntary actions is A cerebellum, B
61:50 involuntary actions is A cerebellum, B modella oblongata, C cerebrum, D
61:54 modella oblongata, C cerebrum, D phthalamus.
61:56 phthalamus. Check mark correct answer. B Modela
61:59 Check mark correct answer. B Modela oblongata. Right arrow explanation.
62:02 oblongata. Right arrow explanation. Modela controls breathing and heart
62:04 Modela controls breathing and heart rate.
62:07 rate. 165.
62:08 165. Which process releases maximum energy?
62:12 Which process releases maximum energy? A. An aerobic respiration, B. Excretion,
62:16 A. An aerobic respiration, B. Excretion, C. Aerobic respiration, D. Diffusion.
62:21 C. Aerobic respiration, D. Diffusion. Check mark. Correct answer. C. Aerobic
62:24 Check mark. Correct answer. C. Aerobic respiration. Right arrow. Explanation.
62:27 respiration. Right arrow. Explanation. Arabic respiration releases the most
62:30 Arabic respiration releases the most energy per molecule of glucose.
62:35 energy per molecule of glucose. 166.
62:36 166. The site of ura formation is A kidney, B
62:41 The site of ura formation is A kidney, B lungs, C stomach, D liver.
62:45 lungs, C stomach, D liver. Check mark correct answer. D liver.
62:48 Check mark correct answer. D liver. Right arrow. Explanation. URA is
62:51 Right arrow. Explanation. URA is synthesized in the liver from ammonia.
62:56 synthesized in the liver from ammonia. 167.
62:57 167. The heart chamber pumping blood to the
63:00 The heart chamber pumping blood to the body is A. Right atrium, B. Left atrium,
63:05 body is A. Right atrium, B. Left atrium, C. Left ventricle, D. Right ventricle.
63:10 C. Left ventricle, D. Right ventricle. Check mark. Correct answer. C. Left
63:13 Check mark. Correct answer. C. Left ventricle. Right arrow. Explanation.
63:15 ventricle. Right arrow. Explanation. Left ventricle pumps oxygenated blood
63:18 Left ventricle pumps oxygenated blood into the aorta.
63:22 into the aorta. 168. Animals excrete waste mainly
63:26 168. Animals excrete waste mainly through A. Photosynthesis, B. Diffusion,
63:30 through A. Photosynthesis, B. Diffusion, C. Excretion, D. Osmosis.
63:34 C. Excretion, D. Osmosis. Check mark. Correct answer. C.
63:37 Check mark. Correct answer. C. Excretion. Right arrow. Explanation.
63:40 Excretion. Right arrow. Explanation. Excretion removes metabolic wastes from
63:43 Excretion removes metabolic wastes from animals.
63:46 animals. 169. In the nephron, filtration occurs
63:50 169. In the nephron, filtration occurs in A. Loop of Henley, B. Glomialis, C.
63:55 in A. Loop of Henley, B. Glomialis, C. Urita, D. Collecting duct.
63:58 Urita, D. Collecting duct. Check mark. Correct answer. B. Glulus.
64:02 Check mark. Correct answer. B. Glulus. Right arrow. Explanation. Filtration
64:05 Right arrow. Explanation. Filtration happens in glomular capillaries.
64:14 170. Air sacks in lungs are called A. Bronchioles. B. Trachea. C. Alvoli. D.
64:18 Bronchioles. B. Trachea. C. Alvoli. D. Willie. Check mark. Correct answer. C.
64:22 Willie. Check mark. Correct answer. C. Alvoli. Right arrow. Explanation. Alvoli
64:26 Alvoli. Right arrow. Explanation. Alvoli are sites of oxygen carbon dioxide
64:28 are sites of oxygen carbon dioxide exchange.
64:33 171 Blood returning from the body enters the
64:36 Blood returning from the body enters the heart wire. A aort B pulmonary artery C
64:41 heart wire. A aort B pulmonary artery C wina cover D coronary artery.
64:45 wina cover D coronary artery. Check mark correct answer. Cena cover
64:49 Check mark correct answer. Cena cover right arrow. Explanation: Wen Carava
64:52 right arrow. Explanation: Wen Carava carries deoxxygenated blood into right
64:54 carries deoxxygenated blood into right atrium.
65:02 172 Blood leaving the lungs as rich in A. Nitrogen, B. Oxygen, C. Water vapor,
65:06 A. Nitrogen, B. Oxygen, C. Water vapor, D. Carbon dioxide.
65:09 D. Carbon dioxide. Check mark. Correct answer. B. Oxygen.
65:13 Check mark. Correct answer. B. Oxygen. Right arrow. Explanation. Blood picks up
65:16 Right arrow. Explanation. Blood picks up oxygen in alvoli.
65:21 173 enzymes are chemically A. Lipids, B
65:25 enzymes are chemically A. Lipids, B proteins, C carbohydrates, D vitamins.
65:30 proteins, C carbohydrates, D vitamins. Check mark correct answer B proteins.
65:34 Check mark correct answer B proteins. Right arrow explanation. Enzymes are
65:36 Right arrow explanation. Enzymes are biological catalysts made of proteins.
65:43 174. The site of absorption of digested food
65:46 The site of absorption of digested food is A large intestine, B small intestine,
65:52 is A large intestine, B small intestine, C stomach, D rectum.
65:55 C stomach, D rectum. Check mark correct answer. B small
65:58 Check mark correct answer. B small intestine. Right arrow explanation.
66:01 intestine. Right arrow explanation. Willie in small intestine absorb
66:04 Willie in small intestine absorb nutrients.
66:08 175. The lungs are protected by A liver, B
66:12 The lungs are protected by A liver, B rib cage, C skull, D diaphragm.
66:18 rib cage, C skull, D diaphragm. Check mark correct answer. B rib cage.
66:21 Check mark correct answer. B rib cage. Right arrow. Explanation. Ribs protect
66:24 Right arrow. Explanation. Ribs protect lungs and heart.
66:27 lungs and heart. 176.
66:29 176. Plant respiration takes place in A
66:33 Plant respiration takes place in A roots, B leaves, C stem, D all parts.
66:39 roots, B leaves, C stem, D all parts. Check mark. Correct answer. D. All parts
66:42 Check mark. Correct answer. D. All parts right arrow. Explanation. Respiration
66:45 right arrow. Explanation. Respiration happens in all living plant cells.
66:50 happens in all living plant cells. 177.
66:52 177. The pigment in RBCs is A. Chlorophyll,
66:56 The pigment in RBCs is A. Chlorophyll, B. Melanin, C. Hemoglobin, D. Keratin.
67:01 B. Melanin, C. Hemoglobin, D. Keratin. Check mark. Correct answer. C.
67:03 Check mark. Correct answer. C. Hemoglobin. Right arrow. Explanation.
67:06 Hemoglobin. Right arrow. Explanation. Hemoglobin gives blood its red color.
67:11 Hemoglobin gives blood its red color. 178.
67:13 178. The diameter of alvoli is A large, B
67:18 The diameter of alvoli is A large, B medium, C very small, D variable.
67:23 medium, C very small, D variable. Check mark. Correct answer. C very
67:26 Check mark. Correct answer. C very small. Right arrow. Explanation. Alvoli
67:29 small. Right arrow. Explanation. Alvoli are microscopic for efficient gas
67:31 are microscopic for efficient gas exchange.
67:36 179. The human heart is surrounded by A
67:39 The human heart is surrounded by A plural, B pericardium, C per paritinium,
67:43 plural, B pericardium, C per paritinium, D maning.
67:46 D maning. Check mark correct answer. B per
67:48 Check mark correct answer. B per paricardium. Right arrow. Explanation.
67:51 paricardium. Right arrow. Explanation. Paricardium is a protective membrane
67:54 Paricardium is a protective membrane around the heart.
67:57 around the heart. 180. The basic unit of lung function is
68:01 180. The basic unit of lung function is A. Nephron B bronchus C alvolus D valve
68:08 A. Nephron B bronchus C alvolus D valve check mark correct answer C alvolus
68:11 check mark correct answer C alvolus right arrow explanation alvoli exchange
68:14 right arrow explanation alvoli exchange oxygen and carbon dioxide
68:20 181 blood is a type of a connective tissue b
68:25 blood is a type of a connective tissue b nervous tissue c muscular tissue d ep
68:28 nervous tissue c muscular tissue d ep epithelial tissue
68:31 epithelial tissue Check mark. Correct answer. A.
68:34 Check mark. Correct answer. A. Connective tissue. Right arrow.
68:36 Connective tissue. Right arrow. Explanation. Blood connects body systems
68:39 Explanation. Blood connects body systems by transporting substances.
68:48 182. Arteries generally carry blood. A toward the heart. B away from the heart.
68:51 toward the heart. B away from the heart. C into bones. D into nerves.
68:55 C into bones. D into nerves. Check mark. Correct answer. B away from
68:58 Check mark. Correct answer. B away from the heart. Right arrow. Explanation:
69:01 the heart. Right arrow. Explanation: Arteries carry blood from heart to
69:03 Arteries carry blood from heart to tissues.
69:06 tissues. 183. Oxygenated blood is bright. A red,
69:11 183. Oxygenated blood is bright. A red, B. Blue. C yellow, D green.
69:16 B. Blue. C yellow, D green. Check mark. Correct answer. A. Red.
69:19 Check mark. Correct answer. A. Red. Right arrow. Explanation. Oxygenrich
69:22 Right arrow. Explanation. Oxygenrich blood appears bright red.
69:26 blood appears bright red. 184. Lymph transports. A. Blood cells.
69:31 184. Lymph transports. A. Blood cells. B. Fatty acids. C. Bone cells. D.
69:36 B. Fatty acids. C. Bone cells. D. Neurons.
69:37 Neurons. Check mark. Correct answer. B. Fatty
69:41 Check mark. Correct answer. B. Fatty acids. Right arrow. Explanation. Lymph
69:44 acids. Right arrow. Explanation. Lymph carries absorbed fats from intestines.
69:50 185. The site of protein digestion is A mouth
69:55 The site of protein digestion is A mouth only, B small intestine only, C stomach
69:59 only, B small intestine only, C stomach and small intestine, D large intestine.
70:04 and small intestine, D large intestine. Check mark correct answer. C stomach and
70:07 Check mark correct answer. C stomach and small intestine. Right arrow
70:09 small intestine. Right arrow explanation. Protein digestion begins in
70:12 explanation. Protein digestion begins in stomach, continues in small intestine.
70:19 186. The valve on the right side of the heart
70:22 The valve on the right side of the heart is called A mitral valve, B tricuspid
70:26 is called A mitral valve, B tricuspid valve, C aortic valve, D pulmonary
70:30 valve, C aortic valve, D pulmonary valve.
70:32 valve. Check mark correct answer. B triricuspid
70:35 Check mark correct answer. B triricuspid valve, right arrow. Explanation
70:37 valve, right arrow. Explanation triricuspid valve separates right atrium
70:40 triricuspid valve separates right atrium and ventricle.
70:45 87. The contraction of diaphragm causes A
70:49 The contraction of diaphragm causes A inhalation, B exhalation, C sweating,
70:53 inhalation, B exhalation, C sweating, Digestion.
70:56 Digestion. Check mark correct answer. A inhalation
70:59 Check mark correct answer. A inhalation right arrow. Explanation. Diaphragm
71:02 right arrow. Explanation. Diaphragm contracts and expands chest cavity.
71:07 contracts and expands chest cavity. 188. The liquid part of blood is a
71:11 188. The liquid part of blood is a hemoglobin. B. Plasma C platelets. D
71:16 hemoglobin. B. Plasma C platelets. D enzyme.
71:18 enzyme. Check mark. Correct answer. B. Plasma.
71:21 Check mark. Correct answer. B. Plasma. Right arrow. Explanation. Plasma
71:24 Right arrow. Explanation. Plasma transports nutrients and hormones.
71:30 189. Cellular respiration releases. A. Carbon
71:34 Cellular respiration releases. A. Carbon dioxide only. B. Oxygen only. C. Energy
71:38 dioxide only. B. Oxygen only. C. Energy and waste gases. D. Saliva.
71:42 and waste gases. D. Saliva. Check mark. Correct answer. C. Energy in
71:46 Check mark. Correct answer. C. Energy in waste gases. Right arrow. Explanation.
71:49 waste gases. Right arrow. Explanation. Respiration releases ATP and CO.
71:54 Respiration releases ATP and CO. 190. Fat digestion needs. A. Pepsin. B.
71:59 190. Fat digestion needs. A. Pepsin. B. Lipase. C. Aise. D. Sacrates.
72:04 Lipase. C. Aise. D. Sacrates. Check mark. Correct answer. B. Lipase.
72:07 Check mark. Correct answer. B. Lipase. Right arrow. Explanation. Lipase breaks
72:10 Right arrow. Explanation. Lipase breaks down fats.
72:18 191. The largest artery in the body is A pulmonary artery, B coronary artery, C
72:22 pulmonary artery, B coronary artery, C aort, D renal artery.
72:26 aort, D renal artery. Check mark correct answer. C aort right
72:29 Check mark correct answer. C aort right arrow. Explanation. Aort carries blood
72:33 arrow. Explanation. Aort carries blood from left ventricle to body.
72:37 from left ventricle to body. 192. Lungs exchange gases with A veins,
72:42 192. Lungs exchange gases with A veins, B arteries, C capillaries, D bronchules.
72:48 B arteries, C capillaries, D bronchules. Check mark correct answer. Capillaries
72:51 Check mark correct answer. Capillaries right arrow. Explanation. Capillaries
72:54 right arrow. Explanation. Capillaries surround alvolifer gas exchange.
72:59 surround alvolifer gas exchange. 193.
73:00 193. Gastric glands secrete. A. Saliva. B.
73:04 Gastric glands secrete. A. Saliva. B. Bile. C. Gastric juice. D. Mucus only.
73:10 Bile. C. Gastric juice. D. Mucus only. Check mark. Correct answer. C. Gastric
73:13 Check mark. Correct answer. C. Gastric juice. Right arrow. Explanation. Gastric
73:16 juice. Right arrow. Explanation. Gastric juice contains pepsin and acid.
73:21 juice contains pepsin and acid. 194.
73:22 194. Plants use sunlight to form. A oxygen
73:26 Plants use sunlight to form. A oxygen only. B. Carbohydrates. C water. D
73:31 only. B. Carbohydrates. C water. D minerals.
73:33 minerals. Check mark. Correct answer. B
73:35 Check mark. Correct answer. B carbohydrates. Right arrow explanation.
73:38 carbohydrates. Right arrow explanation. Photosynthesis produces glucose.
73:43 Photosynthesis produces glucose. 195.
73:45 195. Excretion in plants includes release of
73:49 Excretion in plants includes release of A. Oxygen. B. Carbon dioxide. C. Resins.
73:54 A. Oxygen. B. Carbon dioxide. C. Resins. D. All of these. Check mark. Correct
73:57 D. All of these. Check mark. Correct answer. D. All of these. Right arrow.
74:00 answer. D. All of these. Right arrow. Explanation. Plants excrete gases and
74:03 Explanation. Plants excrete gases and solid substances.
74:08 196 Pulmonary veins carry A. Deoxxygenated
74:12 Pulmonary veins carry A. Deoxxygenated blood, B oxygenated blood, C plasma
74:16 blood, B oxygenated blood, C plasma only, D water only.
74:20 only, D water only. Check mark. Correct answer. B.
74:22 Check mark. Correct answer. B. Oxygenated blood. Right arrow.
74:24 Oxygenated blood. Right arrow. Explanation. Pulmonary veins return
74:27 Explanation. Pulmonary veins return oxygenrich blood to the heart.
74:32 oxygenrich blood to the heart. 197.
74:33 197. The windpipe is also called A. E
74:37 The windpipe is also called A. E esophagus, B trachea, C bronchus, D
74:42 esophagus, B trachea, C bronchus, D larynx.
74:43 larynx. Check mark correct answer. B trachea
74:46 Check mark correct answer. B trachea right arrow. Explanation trachea
74:49 right arrow. Explanation trachea connects larynx to bronchi.
74:53 connects larynx to bronchi. 198
74:55 198 blood cells that protect against
74:57 blood cells that protect against diseases are A RBC's B platelets C WBC's
75:04 diseases are A RBC's B platelets C WBC's D plasma cells
75:07 D plasma cells check mark correct answer C WBC's right
75:11 check mark correct answer C WBC's right arrow explanation WBC's fight infections
75:20 199 The blood vessel that carries blood to
75:22 The blood vessel that carries blood to the liver Liver is A pulmonary artery, B
75:26 the liver Liver is A pulmonary artery, B hpatic portal vein, C coronary artery, D
75:30 hpatic portal vein, C coronary artery, D corroted artery.
75:32 corroted artery. Check mark correct answer. B. Hpatic
75:36 Check mark correct answer. B. Hpatic portal vein. Right arrow. Explanation.
75:38 portal vein. Right arrow. Explanation. Hpatic portal vein carries nutrients
75:41 Hpatic portal vein carries nutrients from intestines to liver.
75:44 from intestines to liver. 200. An aerobic respiration in yeast
75:48 200. An aerobic respiration in yeast produces
75:49 produces A alcohol and CO B lactic acid C oxygen
75:55 A alcohol and CO B lactic acid C oxygen D water only
75:58 D water only check mark correct answer A alcohol and
76:01 check mark correct answer A alcohol and CO right arrow explanation yeast
76:04 CO right arrow explanation yeast fermentss glucose into alcohol and
76:07 fermentss glucose into alcohol and carbon dioxide
76:10 carbon dioxide 201
76:12 201 major excretory product in humans is a
76:16 major excretory product in humans is a lactic acid, b glucose, c ura, d o
76:20 lactic acid, b glucose, c ura, d o oxygen.
76:22 oxygen. Check mark correct answer. C ura right
76:26 Check mark correct answer. C ura right arrow explanation. URA is formed in the
76:29 arrow explanation. URA is formed in the liver from ammonia and excreted by
76:31 liver from ammonia and excreted by kidneys.
76:33 kidneys. 202. The movement of water in plants is
76:37 202. The movement of water in plants is mainly through A flim B. XYLM C
76:42 mainly through A flim B. XYLM C stoometer D. Cortex
76:45 stoometer D. Cortex check mark correct answer. B. XYLM right
76:49 check mark correct answer. B. XYLM right arrow. Explanation. Xyle transports
76:52 arrow. Explanation. Xyle transports water from roots to leaves.
76:55 water from roots to leaves. 203.
76:57 203. Hemoglobin binds with A. Nitrogen B
77:01 Hemoglobin binds with A. Nitrogen B water C oxygen D salts.
77:06 water C oxygen D salts. Check mark. Correct answer. C oxygen.
77:09 Check mark. Correct answer. C oxygen. Right arrow. Explanation: Hemoglobin
77:12 Right arrow. Explanation: Hemoglobin carries oxygen in red blood cells.
77:16 carries oxygen in red blood cells. 204
77:18 204 The process of breaking food into
77:20 The process of breaking food into simpler forms is called A. Excretion, B.
77:24 simpler forms is called A. Excretion, B. Digestion, C respiration, D.
77:27 Digestion, C respiration, D. Photosynthesis.
77:30 Photosynthesis. Check mark. Correct answer. B.
77:32 Check mark. Correct answer. B. Digestion. Right arrow. Explanation.
77:35 Digestion. Right arrow. Explanation. Digestion converts complex food into
77:38 Digestion converts complex food into absorbable nutrients.
77:41 absorbable nutrients. 205
77:43 205 stoometer are mainly found in A roots, B
77:48 stoometer are mainly found in A roots, B stems, C leaves, D flowers.
77:52 stems, C leaves, D flowers. Check mark correct answer. C leaves
77:55 Check mark correct answer. C leaves right arrow. Explanation stoometer
77:58 right arrow. Explanation stoometer regulate gas exchange in leaves.
78:02 regulate gas exchange in leaves. 206.
78:04 206. Which process occurs in mitochondria?
78:08 Which process occurs in mitochondria? A photosynthesis. B protein synthesis. C
78:12 A photosynthesis. B protein synthesis. C aerobic respiration. D excretion.
78:16 aerobic respiration. D excretion. Check mark. Correct answer. C Arabic
78:20 Check mark. Correct answer. C Arabic respiration. Right arrow. Explanation.
78:22 respiration. Right arrow. Explanation. Mitochondria produce ATP during arabic
78:26 Mitochondria produce ATP during arabic respiration.
78:28 respiration. 27.
78:30 27. Plants absorb minerals from soil through
78:33 Plants absorb minerals from soil through A osmosis only, B diffusion only, C
78:38 A osmosis only, B diffusion only, C active transport, D filtration.
78:42 active transport, D filtration. Check mark correct answer C active
78:45 Check mark correct answer C active transport. Right arrow explanation.
78:48 transport. Right arrow explanation. Active transport moves minerals against
78:51 Active transport moves minerals against concentration gradient.
78:54 concentration gradient. 28.
78:56 28. The urinary system does not include A.
78:59 The urinary system does not include A. Kidneys, B ura, C urinary bladder, D
79:04 Kidneys, B ura, C urinary bladder, D lungs.
79:06 lungs. Check mark correct answer. D lungs.
79:09 Check mark correct answer. D lungs. Right arrow. Explanation. Lungs are part
79:12 Right arrow. Explanation. Lungs are part of the respiratory system.
79:15 of the respiratory system. 209.
79:17 209. The process of releasing energy from
79:19 The process of releasing energy from glucose without oxygen is a
79:23 glucose without oxygen is a photosynthesis. B. Anorobic respiration.
79:27 photosynthesis. B. Anorobic respiration. C. Filtration. D. Transpiration. Check
79:30 C. Filtration. D. Transpiration. Check mark. Correct answer. B. An aerobic
79:33 mark. Correct answer. B. An aerobic respiration. Right arrow. Explanation.
79:36 respiration. Right arrow. Explanation. An aerobic respiration occurs without
79:39 An aerobic respiration occurs without oxygen.
79:41 oxygen. 210.
79:42 210. The functional unit of kidneys is called
79:46 The functional unit of kidneys is called A. Nefron, B. Alvolus, C. Willie, D.
79:50 A. Nefron, B. Alvolus, C. Willie, D. Bronchul.
79:52 Bronchul. Check mark. Correct answer. A. Nefron
79:55 Check mark. Correct answer. A. Nefron right arrow. Explanation. Nephrons
79:58 right arrow. Explanation. Nephrons filter blood and form urine.
80:01 filter blood and form urine. 211.
80:03 211. Plants convert solar energy into A. Heat
80:07 Plants convert solar energy into A. Heat energy. B. Sound energy. C. Chemical
80:11 energy. B. Sound energy. C. Chemical energy. D. Mechanical energy.
80:15 energy. D. Mechanical energy. Check mark. Correct answer. C. Chemical
80:18 Check mark. Correct answer. C. Chemical energy. Right arrow. Explanation.
80:21 energy. Right arrow. Explanation. Photosynthesis stores energy is glucose.
80:25 Photosynthesis stores energy is glucose. 212.
80:27 212. The green pigment in plants is A.
80:31 The green pigment in plants is A. Hemoglobin, B melanin, C. Chlorophyll, D
80:35 Hemoglobin, B melanin, C. Chlorophyll, D carotene.
80:37 carotene. Check mark. Correct answer. C.
80:39 Check mark. Correct answer. C. Chlorophyll. Right arrow. Explanation.
80:42 Chlorophyll. Right arrow. Explanation. Chlorophyll absorbs sunlight for
80:44 Chlorophyll absorbs sunlight for photosynthesis.
80:47 photosynthesis. 213.
80:49 213. Bile is stored in the A liver, B
80:53 Bile is stored in the A liver, B pancreas, C gall bladder, D small
80:57 pancreas, C gall bladder, D small intestine.
80:59 intestine. Check mark correct answer. C gall
81:02 Check mark correct answer. C gall bladder. Right arrow explanation. While
81:05 bladder. Right arrow explanation. While is stored and concentrated in the
81:07 is stored and concentrated in the gallbladder.
81:09 gallbladder. 214.
81:11 214. The opening and closing of stometer is
81:13 The opening and closing of stometer is controlled by A guard cells, B xyllem
81:18 controlled by A guard cells, B xyllem cells, C flow cells, D root hairs.
81:23 cells, C flow cells, D root hairs. Check mark correct answer. A guard cells
81:26 Check mark correct answer. A guard cells right arrow. Explanation guard cells
81:29 right arrow. Explanation guard cells regulates toal aperture.
81:33 regulates toal aperture. 215.
81:34 215. The respiratory pigment in humans is A.
81:38 The respiratory pigment in humans is A. Chlorophyll B. Hemoglobin C. Meiain D.
81:43 Chlorophyll B. Hemoglobin C. Meiain D. Melanin.
81:45 Melanin. Check mark. Correct answer. B.
81:47 Check mark. Correct answer. B. Hemoglobin. Right arrow. Explanation.
81:50 Hemoglobin. Right arrow. Explanation. Hemoglobin carries oxygen in blood.
81:54 Hemoglobin carries oxygen in blood. 216.
81:56 216. The human excretory system includes A.
82:00 The human excretory system includes A. Kidneys and uritus, B heart and lungs, C
82:05 Kidneys and uritus, B heart and lungs, C stomach and liver, D bones and muscles.
82:09 stomach and liver, D bones and muscles. Check mark. Correct answer. A. Kidneys
82:12 Check mark. Correct answer. A. Kidneys and uritas. Right arrow. Explanation.
82:15 and uritas. Right arrow. Explanation. Kidneys, uritus, bladder, and urethra
82:19 Kidneys, uritus, bladder, and urethra form the excretory system.
82:22 form the excretory system. 217.
82:24 217. Photosynthesis requires a water only, b
82:29 Photosynthesis requires a water only, b oxygen only, c light water and carbon
82:34 oxygen only, c light water and carbon dioxide, D nitrogen only.
82:37 dioxide, D nitrogen only. Check mark. Correct answer. C. Light,
82:41 Check mark. Correct answer. C. Light, water, and carbon dioxide. Right arrow.
82:44 water, and carbon dioxide. Right arrow. Explanation. These are raw materials for
82:47 Explanation. These are raw materials for photosynthesis.
82:50 photosynthesis. 218.
82:52 218. Enzymes in saliva digest. A. Fats. B.
82:56 Enzymes in saliva digest. A. Fats. B. Proteins. C. Star starch. D. Vitamins.
83:01 Proteins. C. Star starch. D. Vitamins. Check mark. Correct answer. C. Star
83:04 Check mark. Correct answer. C. Star starch. Right arrow. Explanation.
83:06 starch. Right arrow. Explanation. Salivary amalayise breaks starch into
83:09 Salivary amalayise breaks starch into sugars.
83:11 sugars. 219.
83:13 219. The organ producing digestive enzymes
83:16 The organ producing digestive enzymes and hormones is A. Kidney, B. Pancreas,
83:20 and hormones is A. Kidney, B. Pancreas, C lungs, D. Heart. Check mark. Correct
83:25 C lungs, D. Heart. Check mark. Correct answer. B. Pancreas. Right arrow.
83:28 answer. B. Pancreas. Right arrow. Explanation. Pancreas secretes insulin
83:31 Explanation. Pancreas secretes insulin and digestive juices.
83:34 and digestive juices. 220.
83:36 220. Deoxxygenated blood is pumped into lungs
83:39 Deoxxygenated blood is pumped into lungs by A left ventricle, B right ventricle,
83:44 by A left ventricle, B right ventricle, C left atrium, D right atrium.
83:48 C left atrium, D right atrium. Check mark correct answer. B right
83:51 Check mark correct answer. B right ventricle, right arrow. Explanation.
83:54 ventricle, right arrow. Explanation. Right ventricle sends blood to lungs for
83:57 Right ventricle sends blood to lungs for oxygenation.
83:59 oxygenation. 221.
84:01 221. The largest gland in the body is A
84:05 The largest gland in the body is A kidney, B liver, C pancreas, D lungs.
84:11 kidney, B liver, C pancreas, D lungs. Check mark correct answer. B liver right
84:14 Check mark correct answer. B liver right arrow explanation. Liver performs many
84:17 arrow explanation. Liver performs many metabolic functions.
84:20 metabolic functions. 222.
84:22 222. The cardiac cycle refers to A
84:26 The cardiac cycle refers to A respiration process, B filtration in
84:29 respiration process, B filtration in kidneys, C hearts pumping action,
84:33 kidneys, C hearts pumping action, Digestion process.
84:36 Digestion process. Check mark correct answer. C hearts
84:39 Check mark correct answer. C hearts pumping action. Right arrow explanation.
84:42 pumping action. Right arrow explanation. It includes contraction and relaxation
84:44 It includes contraction and relaxation of heart chambers.
84:47 of heart chambers. 223.
84:50 223. The element essential in hemoglobin is A
84:54 The element essential in hemoglobin is A magnesium, B zinc, C iron, D sodium.
84:59 magnesium, B zinc, C iron, D sodium. Check mark correct answer. C iron. Right
85:03 Check mark correct answer. C iron. Right arrow explanation. Iron binds oxygen in
85:06 arrow explanation. Iron binds oxygen in hemoglobin.
85:09 hemoglobin. 224.
85:11 224. Exhalation involves
85:14 Exhalation involves a contracting diaphragm, b relaxing
85:17 a contracting diaphragm, b relaxing diaphragm, c enlarging chest cavity, d
85:21 diaphragm, c enlarging chest cavity, d increasing lung volume.
85:24 increasing lung volume. Check mark correct answer. B relaxing
85:27 Check mark correct answer. B relaxing diaphragm right arrow explanation.
85:30 diaphragm right arrow explanation. Diaphragm relaxes pushing air out.
85:34 Diaphragm relaxes pushing air out. 225.
85:37 225. Fat digestion takes place mainly in A
85:41 Fat digestion takes place mainly in A large intestine, B small intestine, C
85:45 large intestine, B small intestine, C mouth, D rectum.
85:48 mouth, D rectum. Check mark correct answer B small
85:51 Check mark correct answer B small intestine. Right arrow explanation B and
85:54 intestine. Right arrow explanation B and lipase act in the small intestine.
85:58 lipase act in the small intestine. 226.
86:01 226. Glomeololis is found in A nephron, B
86:05 Glomeololis is found in A nephron, B alvolus, C willie, D lymph.
86:09 alvolus, C willie, D lymph. Check mark correct answer. A nephron
86:12 Check mark correct answer. A nephron right arrow. Explanation. Glomeololis
86:15 right arrow. Explanation. Glomeololis filters blood in nephron.
86:18 filters blood in nephron. 227.
86:21 227. The voice box is another name for A
86:25 The voice box is another name for A trachea, B larynx, C fairings, D
86:29 trachea, B larynx, C fairings, D epiglotus.
86:31 epiglotus. Check mark correct answer. B larynx
86:34 Check mark correct answer. B larynx right arrow. Explanation. Larynx
86:37 right arrow. Explanation. Larynx contains vocal cords.
86:40 contains vocal cords. 228.
86:43 228. The final digestion of food occurs in A
86:47 The final digestion of food occurs in A mouth, B stomach, C small intestine, D
86:51 mouth, B stomach, C small intestine, D large intestine.
86:54 large intestine. Check mark correct answer. C small
86:57 Check mark correct answer. C small intestine. Right arrow. Explanation.
87:00 intestine. Right arrow. Explanation. Most digestion and absorption happen in
87:02 Most digestion and absorption happen in the small intestine.
87:05 the small intestine. 229.
87:08 229. Which organ controls heartbeat rate? A.
87:11 Which organ controls heartbeat rate? A. Liver. B. Brain modeler. C. Lungs. D.
87:16 Liver. B. Brain modeler. C. Lungs. D. Kidneys.
87:18 Kidneys. Check mark. Correct answer. B. Brain
87:21 Check mark. Correct answer. B. Brain modeler. Right arrow. Explanation.
87:24 modeler. Right arrow. Explanation. Modeller oblongata regulates heartbeat.
87:28 Modeller oblongata regulates heartbeat. 230.
87:30 230. The pulmonary artery carries a
87:34 The pulmonary artery carries a oxygenated blood, B deoxxygenated blood,
87:38 oxygenated blood, B deoxxygenated blood, C only plasma, D platelets only. Check
87:42 C only plasma, D platelets only. Check mark correct answer. B de oxygenated
87:46 mark correct answer. B de oxygenated blood. Right arrow. Explanation.
87:48 blood. Right arrow. Explanation. Pulmonary artery sends deoxxygenated
87:51 Pulmonary artery sends deoxxygenated blood to lungs.
87:53 blood to lungs. 231.
87:56 231. Wastes in plants sometimes accumulate as
88:00 Wastes in plants sometimes accumulate as A water B gums and resins C chlorophyll
88:05 A water B gums and resins C chlorophyll D proteins.
88:07 D proteins. Check mark correct answer B gums and
88:10 Check mark correct answer B gums and resins. Right arrow explanation. Plants
88:14 resins. Right arrow explanation. Plants store waste products like gums.
88:17 store waste products like gums. 232.
88:19 232. The enzyme lipase digests a. Proteins B.
88:24 The enzyme lipase digests a. Proteins B. sugars, C fats, D vitamins.
88:29 sugars, C fats, D vitamins. Check mark correct answer. C fats. Right
88:32 Check mark correct answer. C fats. Right arrow. Explanation. Lipase breaks fats
88:36 arrow. Explanation. Lipase breaks fats into fatty acids and glycerol.
88:39 into fatty acids and glycerol. 233.
88:41 233. The kidney removes excess. A. Water. B.
88:46 The kidney removes excess. A. Water. B. Oxygen. C. Star starch. D. Hormones
88:49 Oxygen. C. Star starch. D. Hormones only. Check mark. Correct answer. A
88:53 only. Check mark. Correct answer. A water right arrow explanation kidneys
88:56 water right arrow explanation kidneys regulate water balance
89:00 regulate water balance 234
89:02 234 ATP is produced in A cytoplasm only B
89:08 ATP is produced in A cytoplasm only B mitochondria C cell wall D ribosome
89:12 mitochondria C cell wall D ribosome check mark correct answer B mitochondria
89:16 check mark correct answer B mitochondria right arrow explanation mitochondria are
89:19 right arrow explanation mitochondria are known as powerhouses of the cell
89:23 known as powerhouses of the cell 235.
89:25 235. The heart has how many valves? A 2 B 3 C
89:31 The heart has how many valves? A 2 B 3 C 4 D5.
89:34 4 D5. Check mark. Correct answer. C4. Right
89:37 Check mark. Correct answer. C4. Right arrow. Explanation. Heart valves
89:40 arrow. Explanation. Heart valves regulate blood flow direction.
89:43 regulate blood flow direction. 236.
89:46 236. Transllocation occurs in A roots only,
89:50 Transllocation occurs in A roots only, B. XYM C Floomm D stoometer
89:55 B. XYM C Floomm D stoometer check mark correct answer C flim right
89:59 check mark correct answer C flim right arrow explanation FHM transports food
90:02 arrow explanation FHM transports food substances
90:05 substances 237
90:07 237 an aerobic respiration in muscles forms
90:11 an aerobic respiration in muscles forms A alcohol B water only C lactic acid D
90:17 A alcohol B water only C lactic acid D glucose
90:19 glucose check mark correct Answer C. Lactic acid
90:22 check mark correct Answer C. Lactic acid right arrow. Explanation. Anorobic
90:25 right arrow. Explanation. Anorobic respiration causes muscle fatigue.
90:29 respiration causes muscle fatigue. 238.
90:31 238. RBC's are formed in A. Kidneys, B. Bone
90:36 RBC's are formed in A. Kidneys, B. Bone marrow, C lungs, D heart. Check mark.
90:41 marrow, C lungs, D heart. Check mark. Correct answer. Bone marrow. Right
90:44 Correct answer. Bone marrow. Right arrow. Explanation. RBC's are produced
90:47 arrow. Explanation. RBC's are produced in bone marrow.
90:50 in bone marrow. 239.
90:52 239. Water enters plant roots by A. A active
90:56 Water enters plant roots by A. A active transport, B. Evaporation, C osmosis, D
91:01 transport, B. Evaporation, C osmosis, D excretion.
91:03 excretion. Check mark. Correct answer. C. Osmosis.
91:06 Check mark. Correct answer. C. Osmosis. Right arrow. Explanation. Water moves
91:09 Right arrow. Explanation. Water moves from soil into root cells via osmosis.
91:14 from soil into root cells via osmosis. 240.
91:16 240. The urinary bladder stores urine. A
91:19 The urinary bladder stores urine. A temporarily, B permanently, C for
91:23 temporarily, B permanently, C for digestion, D as fat.
91:26 digestion, D as fat. Check mark. Correct answer. A
91:29 Check mark. Correct answer. A temporarily. Right arrow. Explanation.
91:32 temporarily. Right arrow. Explanation. Bladder holds urine until released.
91:36 Bladder holds urine until released. 241.
91:38 241. The organ regulating blood sugar is A
91:42 The organ regulating blood sugar is A heart, B liver, C pancreas, D lungs.
91:48 heart, B liver, C pancreas, D lungs. Check mark correct answer. C pancreas.
91:51 Check mark correct answer. C pancreas. Right arrow. Explanation. Pancreas
91:54 Right arrow. Explanation. Pancreas secretes insulin to control blood sugar.
91:58 secretes insulin to control blood sugar. 242.
92:00 242. Transpiration cools the A. Soil, B.
92:04 Transpiration cools the A. Soil, B. Plant, C. Water table, D. Fruit only.
92:09 Plant, C. Water table, D. Fruit only. Check mark. Correct answer. B. Plant.
92:12 Check mark. Correct answer. B. Plant. Right arrow. Explanation. Water loss
92:15 Right arrow. Explanation. Water loss through leaves cools plants.
92:19 through leaves cools plants. 243.
92:21 243. The pulmonary veins carry blood to A.
92:25 The pulmonary veins carry blood to A. Lungs. B. Right atrium. C. Left atrium.
92:29 Lungs. B. Right atrium. C. Left atrium. D liver.
92:31 D liver. Check mark. Correct answer. C. Left
92:34 Check mark. Correct answer. C. Left atrium. Right arrow. Explanation.
92:37 atrium. Right arrow. Explanation. Pulmonary veins bring oxygenated blood
92:40 Pulmonary veins bring oxygenated blood to left atrium.
92:42 to left atrium. 244.
92:44 244. In plants, water loss occurs through A.
92:48 In plants, water loss occurs through A. Lentils, B root hairs, C flowers, D flm.
92:55 Lentils, B root hairs, C flowers, D flm. Check mark. Correct answer. A. Lentils.
92:58 Check mark. Correct answer. A. Lentils. Right arrow. Explanation. Lentils allow
93:02 Right arrow. Explanation. Lentils allow gas exchange and water loss.
93:05 gas exchange and water loss. 245
93:08 245 Gastric juice contains a amalayise b
93:12 Gastric juice contains a amalayise b hydrochloric acid C bile salts D oxygen
93:17 hydrochloric acid C bile salts D oxygen only check mark correct answer B
93:21 only check mark correct answer B hydrochloric acid right arrow
93:23 hydrochloric acid right arrow explanation HCL helps digestion in
93:26 explanation HCL helps digestion in stomach
93:28 stomach 246
93:31 246 Oxygen is carried in blood by a WBC's B
93:37 Oxygen is carried in blood by a WBC's B platelets C hemoglobin D plasma only
93:42 platelets C hemoglobin D plasma only check mark correct answer C hemoglobin
93:46 check mark correct answer C hemoglobin right arrow explanation hemoglobin binds
93:49 right arrow explanation hemoglobin binds oxygen in RBC's
93:52 oxygen in RBC's 247
93:55 247 A nephron consist of A lungs and bronchi
93:59 A nephron consist of A lungs and bronchi b glomeisent tubule C pham and xylem B.
94:04 b glomeisent tubule C pham and xylem B. Heart chambers.
94:07 Heart chambers. Check mark. Correct answer. B. Glulus
94:10 Check mark. Correct answer. B. Glulus and tubule. Right arrow. Explanation.
94:13 and tubule. Right arrow. Explanation. Nephron filters blood and reabsorbs
94:16 Nephron filters blood and reabsorbs useful substances.
94:18 useful substances. 248.
94:21 248. ATP full form is A adenosine
94:25 ATP full form is A adenosine triphosphate, B amalayise triphosphate,
94:28 triphosphate, B amalayise triphosphate, C amino triphosphate, D addin
94:32 C amino triphosphate, D addin triphosphate.
94:34 triphosphate. Check mark correct answer. A adenosine
94:37 Check mark correct answer. A adenosine triphosphate. Right arrow explanation.
94:40 triphosphate. Right arrow explanation. ATP stores energy in phosphate bonds.
94:44 ATP stores energy in phosphate bonds. 249.
94:47 249. Plants remove wastes through A
94:50 Plants remove wastes through A perspiration, B lungs, C transpiration,
94:54 perspiration, B lungs, C transpiration, D heart. Check mark. Correct answer. C
94:59 D heart. Check mark. Correct answer. C transpiration. Right arrow. Explanation.
95:02 transpiration. Right arrow. Explanation. Water and wastes are lost via
95:04 Water and wastes are lost via transpiration.
95:06 transpiration. 250.
95:08 250. The liver stores. A water bile. C.
95:13 The liver stores. A water bile. C. Glucose is glycogen. D. Oxygen.
95:17 Glucose is glycogen. D. Oxygen. Check mark. Correct answer. C. Glucose
95:20 Check mark. Correct answer. C. Glucose is glycogen. Right arrow. Explanation.
95:24 is glycogen. Right arrow. Explanation. Liver stores excess glucose as glycogen.
95:28 Liver stores excess glucose as glycogen. 251.
95:30 251. In humans, urine passes from kidneys to
95:34 In humans, urine passes from kidneys to bladder through a urethra. B nephron C
95:39 bladder through a urethra. B nephron C ur tubule.
95:42 ur tubule. Check mark. Correct answer. C. Urea
95:45 Check mark. Correct answer. C. Urea right arrow explanation. Uritas are
95:48 right arrow explanation. Uritas are tubes carrying urine from kidneys to
95:50 tubes carrying urine from kidneys to bladder.
95:52 bladder. 252.
95:54 252. The organ that stores bile. A. Liver. B.
95:59 The organ that stores bile. A. Liver. B. Kidney. C. Pancreas. D. Gall bladder.
96:04 Kidney. C. Pancreas. D. Gall bladder. Check mark. Correct answer. D.
96:06 Check mark. Correct answer. D. Gallbladder. Right arrow. Explanation.
96:09 Gallbladder. Right arrow. Explanation. Bile produced in liver is stored in the
96:12 Bile produced in liver is stored in the gallbladder.
96:14 gallbladder. 253.
96:16 253. The tiny paws on leaves are A. Willie, B
96:21 The tiny paws on leaves are A. Willie, B alvoli, C stoometer, D nephrons.
96:26 alvoli, C stoometer, D nephrons. Check mark correct answer. C stoometer
96:29 Check mark correct answer. C stoometer right arrow. Explanation. Stoometer
96:32 right arrow. Explanation. Stoometer regulate gas exchange and transpiration.
96:36 regulate gas exchange and transpiration. 254.
96:38 254. The main purpose of respiration is to
96:41 The main purpose of respiration is to produce. A water, B energy, C glucose, D
96:47 produce. A water, B energy, C glucose, D salt.
96:49 salt. Check mark correct answer. B energy.
96:52 Check mark correct answer. B energy. Right arrow. Explanation. Respiration
96:55 Right arrow. Explanation. Respiration releases energy stored in food.
96:58 releases energy stored in food. 255.
97:01 255. The process by which green plants make
97:03 The process by which green plants make food is called a respiration, B.
97:07 food is called a respiration, B. Transpiration, C photosynthesis, D
97:11 Transpiration, C photosynthesis, D germination.
97:13 germination. Check mark correct answer. C.
97:16 Check mark correct answer. C. Photosynthesis. Right arrow.
97:18 Photosynthesis. Right arrow. Explanation. Plants convert sunlight to
97:21 Explanation. Plants convert sunlight to food via photosynthesis.
97:24 food via photosynthesis. 256.
97:26 256. Gaseous exchange in humans takes place
97:29 Gaseous exchange in humans takes place in the A. Trachea. B. Lungs. C. Alvoli.
97:35 in the A. Trachea. B. Lungs. C. Alvoli. D. Bronchi.
97:37 D. Bronchi. Check mark. Correct answer. C. Alvoli
97:40 Check mark. Correct answer. C. Alvoli right arrow. Explanation. Alvoli are air
97:44 right arrow. Explanation. Alvoli are air sacks where gas exchange occurs.
97:47 sacks where gas exchange occurs. 257.
97:50 257. An aerobic respiration in muscles forms.
97:54 An aerobic respiration in muscles forms. A. Alcohol. B. Lactic acid. C. Water. D.
97:59 A. Alcohol. B. Lactic acid. C. Water. D. Oxygen.
98:01 Oxygen. Check mark. Correct answer. B. Lactic
98:04 Check mark. Correct answer. B. Lactic acid. Right arrow. Explanation: In
98:07 acid. Right arrow. Explanation: In absence of oxygen, muscles produce
98:10 absence of oxygen, muscles produce lactic acid.
98:12 lactic acid. 258.
98:14 258. The valve between left atrium and
98:17 The valve between left atrium and ventricle is A. Triricuspid valve. B.
98:21 ventricle is A. Triricuspid valve. B. Bicasper valve. C. Aortic valve. D.
98:25 Bicasper valve. C. Aortic valve. D. Pulmonary valve.
98:27 Pulmonary valve. Check mark. Correct answer. B. Bicasper
98:31 Check mark. Correct answer. B. Bicasper valve. Right arrow. Explanation. also
98:34 valve. Right arrow. Explanation. also called mital valve. It prevents
98:36 called mital valve. It prevents backflow.
98:38 backflow. 259.
98:40 259. The organ filtering blood in humans is
98:44 The organ filtering blood in humans is A. Liver, B. Kidney, C. Heart, D. Lungs.
98:50 A. Liver, B. Kidney, C. Heart, D. Lungs. Check mark. Correct answer. B. Kidney.
98:53 Check mark. Correct answer. B. Kidney. Right arrow. Explanation. Kidneys filter
98:56 Right arrow. Explanation. Kidneys filter waste and excess water from blood.
98:59 waste and excess water from blood. 260.
99:01 260. Which cell transports oxygen? A.
99:04 Which cell transports oxygen? A. Platelet. B. White blood cell. C. Red
99:08 Platelet. B. White blood cell. C. Red blood cell. D neuron.
99:11 blood cell. D neuron. Check mark. Correct answer. C. Red blood
99:15 Check mark. Correct answer. C. Red blood cell. Right arrow. Explanation. RBCs
99:18 cell. Right arrow. Explanation. RBCs carry oxygen bound to hemoglobin.
99:22 carry oxygen bound to hemoglobin. 261.
99:24 261. The human circulatory system is A open,
99:29 The human circulatory system is A open, B closed, C partially open, D air
99:33 B closed, C partially open, D air filled. Check mark. Correct answer. B
99:37 filled. Check mark. Correct answer. B closed. Right arrow. Explanation. Blood
99:40 closed. Right arrow. Explanation. Blood flows in vessels forming a closed loop.
99:44 flows in vessels forming a closed loop. 262.
99:46 262. Photosynthesis produces A. Water and
99:50 Photosynthesis produces A. Water and minerals, B. Oxygen and glucose. C.
99:54 minerals, B. Oxygen and glucose. C. Carbon dioxide. D. Nitrogen.
99:58 Carbon dioxide. D. Nitrogen. Check mark. Correct answer. B. Oxygen
100:01 Check mark. Correct answer. B. Oxygen and glucose. Right arrow. Explanation.
100:04 and glucose. Right arrow. Explanation. Products of photosynthesis are sugar and
100:07 Products of photosynthesis are sugar and oxygen.
100:09 oxygen. 263.
100:11 263. Water absorption in humans takes place
100:14 Water absorption in humans takes place in A stomach, B large intestine, C
100:19 in A stomach, B large intestine, C liver, D esophagus.
100:22 liver, D esophagus. Check mark correct answer B large
100:25 Check mark correct answer B large intestine. Right arrow explanation.
100:28 intestine. Right arrow explanation. Large intestine absorbs water to form
100:31 Large intestine absorbs water to form solid waste.
100:33 solid waste. 264.
100:36 264. Which is a double circulatory system? A.
100:40 Which is a double circulatory system? A. Fish. B. Insects. C. Humans. D. Sponges.
100:46 Fish. B. Insects. C. Humans. D. Sponges. Check mark. Correct answer. C. Humans.
100:49 Check mark. Correct answer. C. Humans. Right arrow. Explanation. Humans have
100:52 Right arrow. Explanation. Humans have separate pulmonary and systemic circuit.
100:56 separate pulmonary and systemic circuit. 265.
100:58 265. Hemoglobin contains a calcium b sodium c
101:04 Hemoglobin contains a calcium b sodium c iron d phosphorus.
101:07 iron d phosphorus. Check mark. Correct answer. C. Iron
101:10 Check mark. Correct answer. C. Iron right arrow explanation. Iron binds
101:13 right arrow explanation. Iron binds oxygen in hemoglobin.
101:16 oxygen in hemoglobin. 266.
101:19 266. Gills are respiratory organs in A.
101:22 Gills are respiratory organs in A. Insects. B. Humans. C. Fish. D. Birds.
101:28 Insects. B. Humans. C. Fish. D. Birds. Check mark. Correct answer. C. Fish.
101:31 Check mark. Correct answer. C. Fish. Right arrow. Explanation gives extract
101:34 Right arrow. Explanation gives extract oxygen from water.
101:37 oxygen from water. 267.
101:40 267. Will he increase? A bone strength, B
101:44 Will he increase? A bone strength, B digestion speed, C absorptive surface
101:47 digestion speed, C absorptive surface area, D blood clotting.
101:50 area, D blood clotting. Check mark correct answer. C absorptive
101:54 Check mark correct answer. C absorptive surface area. Right arrow explanation.
101:57 surface area. Right arrow explanation. Willy enhance nutrient absorption in
102:00 Willy enhance nutrient absorption in small intestine.
102:02 small intestine. 268.
102:04 268. The functional unit of lungs is A
102:08 The functional unit of lungs is A bronchus, B alvolus, C trachea, D
102:12 bronchus, B alvolus, C trachea, D larynx.
102:14 larynx. Check mark correct answer. B alvolus
102:17 Check mark correct answer. B alvolus right arrow explanation. Alvoli perform
102:21 right arrow explanation. Alvoli perform gas exchange.
102:23 gas exchange. 269.
102:26 269. Water enters plant roots by A. Active
102:30 Water enters plant roots by A. Active transport, B. Diffusion, C. Osmosis, D.
102:34 transport, B. Diffusion, C. Osmosis, D. Filtration.
102:36 Filtration. Check mark. Correct answer. C. Osmosis.
102:40 Check mark. Correct answer. C. Osmosis. Right arrow. Explanation. Water moves
102:43 Right arrow. Explanation. Water moves from high to low concentration.
102:46 from high to low concentration. 270.
102:48 270. The human heart has A one chamber, B two
102:53 The human heart has A one chamber, B two chambers, C three chambers, D four
102:57 chambers, C three chambers, D four chambers.
102:59 chambers. Check mark. Correct answer. D. Four
103:02 Check mark. Correct answer. D. Four chambers. Right arrow. Explanation. Two
103:05 chambers. Right arrow. Explanation. Two atria and two ventricles form the heart.
103:09 atria and two ventricles form the heart. 271.
103:11 271. Excess glucose is stored as a sucrose b
103:16 Excess glucose is stored as a sucrose b cellulose c glycogen d starch.
103:21 cellulose c glycogen d starch. Check mark. Correct answer. C glycogen.
103:24 Check mark. Correct answer. C glycogen. Right arrow. Explanation. Humans store
103:27 Right arrow. Explanation. Humans store glucose as glycogen in liver and
103:30 glucose as glycogen in liver and muscles.
103:32 muscles. 272.
103:34 272. Hemoglobin gives blood. A white color,
103:38 Hemoglobin gives blood. A white color, B. Yellow color, C red color, D green
103:43 B. Yellow color, C red color, D green color. Check mark. Correct answer. C red
103:47 color. Check mark. Correct answer. C red color. Right arrow. Explanation. Iron in
103:50 color. Right arrow. Explanation. Iron in hemoglobin makes blood red.
103:54 hemoglobin makes blood red. 273.
103:56 273. Blood leaving the heart through a is a
104:00 Blood leaving the heart through a is a oxygenated, b de oxygenated, c mixed
104:04 oxygenated, b de oxygenated, c mixed blood, d plasma only. Check mark correct
104:09 blood, d plasma only. Check mark correct answer. A oxygenated. Right arrow.
104:12 answer. A oxygenated. Right arrow. Explanation. Aort carries oxygenrich
104:15 Explanation. Aort carries oxygenrich blood.
104:17 blood. 274.
104:20 274. Which waste gas is released during
104:22 Which waste gas is released during respiration?
104:24 respiration? A. Nitrogen. B. Oxygen. C. Hydrogen. D.
104:29 A. Nitrogen. B. Oxygen. C. Hydrogen. D. Carbon dioxide.
104:31 Carbon dioxide. Check mark. Correct answer. D. Carbon
104:34 Check mark. Correct answer. D. Carbon dioxide. Right arrow. Explanation. Co is
104:38 dioxide. Right arrow. Explanation. Co is a waste of cellular respiration.
104:41 a waste of cellular respiration. 275.
104:44 275. The main nitrogenous waste in humans is
104:48 The main nitrogenous waste in humans is a uric acid. B. URA. C. Ammonia. D.
104:52 a uric acid. B. URA. C. Ammonia. D. Nitrate.
104:54 Nitrate. Check mark. Correct answer. B. URA.
104:57 Check mark. Correct answer. B. URA. Right arrow. Explanation. URA is
105:00 Right arrow. Explanation. URA is excreted in urine.
105:03 excreted in urine. 276.
105:06 276. Heartbeat is controlled by A. Kidneys,
105:09 Heartbeat is controlled by A. Kidneys, B. Brain modeler, C lungs, D liver.
105:15 B. Brain modeler, C lungs, D liver. Check mark. Correct answer. B. Brain
105:18 Check mark. Correct answer. B. Brain modeler right arrow explanation modeler
105:22 modeler right arrow explanation modeler oblongata regulates involuntary actions
105:26 oblongata regulates involuntary actions 277
105:29 277 The pigment needed for photosynthesis is
105:33 The pigment needed for photosynthesis is a melanin b hemoglobin c chlorophyll d
105:38 a melanin b hemoglobin c chlorophyll d insulin
105:39 insulin check mark correct answer c chlorophyll
105:43 check mark correct answer c chlorophyll right arrow explanation chlorophyll
105:45 right arrow explanation chlorophyll captures sunlight
105:48 captures sunlight 278.
105:50 278. The pulmonary veins carry blood to the
105:54 The pulmonary veins carry blood to the A. Right atrium. B right ventricle. C
105:58 A. Right atrium. B right ventricle. C left atrium. D left ventricle.
106:02 left atrium. D left ventricle. Check mark. Correct answer. C. Left
106:05 Check mark. Correct answer. C. Left atrium. Right arrow. Explanation.
106:08 atrium. Right arrow. Explanation. Pulmonary veins return oxygenated blood.
106:13 Pulmonary veins return oxygenated blood. 279.
106:15 279. The lungs are protected by A skin, B
106:19 The lungs are protected by A skin, B diaphragm, C rib cage, D liver.
106:24 diaphragm, C rib cage, D liver. Check mark correct answer. C rib cage.
106:28 Check mark correct answer. C rib cage. Right arrow explanation. Ribs protect
106:31 Right arrow explanation. Ribs protect thoracic organs.
106:33 thoracic organs. 280.
106:35 280. Energy in cells is stored as A D N A B
106:41 Energy in cells is stored as A D N A B AP C starch D protein.
106:46 AP C starch D protein. Check mark correct answer. B AP Right
106:50 Check mark correct answer. B AP Right arrow explanation. ATP stores and
106:53 arrow explanation. ATP stores and transfers energy.
106:55 transfers energy. 281.
106:58 281. The flap preventing food from entering
107:00 The flap preventing food from entering windpipe is a trachea. B. Epiglotus. C.
107:05 windpipe is a trachea. B. Epiglotus. C. Finx. D. Larynx.
107:08 Finx. D. Larynx. Check mark. Correct answer. B.
107:11 Check mark. Correct answer. B. Epiglotus. Right arrow. Explanation.
107:14 Epiglotus. Right arrow. Explanation. Epiglotus closes airway during
107:16 Epiglotus closes airway during swallowing.
107:18 swallowing. 282.
107:21 282. The right side of heart pumps. A.
107:24 The right side of heart pumps. A. Oxygenated blood. B. Lymph. C.
107:28 Oxygenated blood. B. Lymph. C. Deoxxygenated blood. D. Plasma. Only
107:32 Deoxxygenated blood. D. Plasma. Only check mark. Correct answer. C.
107:35 check mark. Correct answer. C. Deoxxygenated blood. Right arrow.
107:37 Deoxxygenated blood. Right arrow. Explanation. Right side sends blood to
107:40 Explanation. Right side sends blood to lungs.
107:42 lungs. 283.
107:44 283. The lungs remove. A. Salts. B. URA. C.
107:49 The lungs remove. A. Salts. B. URA. C. Carbon dioxide. D. Sugars.
107:53 Carbon dioxide. D. Sugars. Check mark. Correct answer. C. Carbon
107:56 Check mark. Correct answer. C. Carbon dioxide. Right arrow. Explanation. Co is
108:00 dioxide. Right arrow. Explanation. Co is exhaled from lungs.
108:02 exhaled from lungs. 284.
108:05 284. The liver converts excess glucose into
108:08 The liver converts excess glucose into A. Protein, B fats only, C glycogen, D
108:14 A. Protein, B fats only, C glycogen, D oxygen. Check mark. Correct answer. C
108:17 oxygen. Check mark. Correct answer. C glycogen. Right arrow. Explanation.
108:20 glycogen. Right arrow. Explanation. Liver stores glucose as glycogen.
108:24 Liver stores glucose as glycogen. 285.
108:26 285. Gastric juice contains a amalayise, bile
108:31 Gastric juice contains a amalayise, bile salts, C hydrochloric acid, D oxygen.
108:36 salts, C hydrochloric acid, D oxygen. Check mark correct answer C hydrochloric
108:40 Check mark correct answer C hydrochloric acid. Right arrow explanation. HCL helps
108:44 acid. Right arrow explanation. HCL helps digestion in stomach.
108:46 digestion in stomach. 286.
108:49 286. The tube connecting mouth to stomach is
108:52 The tube connecting mouth to stomach is A trachea, B esophagus, C bronchus, D
108:57 A trachea, B esophagus, C bronchus, D alvololis.
108:59 alvololis. Check mark correct answer. B esophagus
109:03 Check mark correct answer. B esophagus right arrow explanation. Eophagus
109:06 right arrow explanation. Eophagus carries food to stomach.
109:09 carries food to stomach. 287
109:11 287 Blood plasma is mostly Aion, B water, C
109:17 Blood plasma is mostly Aion, B water, C protein only, D fat.
109:20 protein only, D fat. Check mark correct answer B water. Right
109:23 Check mark correct answer B water. Right arrow explanation plasma is
109:26 arrow explanation plasma is approximately 90% water.
109:30 approximately 90% water. 288
109:32 288 plants excrete through a stoometer, B
109:36 plants excrete through a stoometer, B flowers only, C xyllem only, D seeds.
109:42 flowers only, C xyllem only, D seeds. Check mark correct answer. A stoometer.
109:45 Check mark correct answer. A stoometer. Right arrow. Explanation. Gases and
109:48 Right arrow. Explanation. Gases and water exit via stoometer.
109:51 water exit via stoometer. 289.
109:54 289. Bile helps in digesting. A. Sugars. B.
109:58 Bile helps in digesting. A. Sugars. B. Fats. C. Proteins. D. Vitamins.
110:03 Fats. C. Proteins. D. Vitamins. Check mark. Correct answer. B. Fats.
110:06 Check mark. Correct answer. B. Fats. Right arrow. Explanation. Bile
110:08 Right arrow. Explanation. Bile emulsifies fat.
110:11 emulsifies fat. 290.
110:13 290. Fatty acids are absorbed in A. Mouth. B.
110:17 Fatty acids are absorbed in A. Mouth. B. Stomach. C. Small intestine. D large
110:21 Stomach. C. Small intestine. D large intestine.
110:23 intestine. Check mark. Correct answer. C. Small
110:26 Check mark. Correct answer. C. Small intestine. Right arrow. Explanation:
110:29 intestine. Right arrow. Explanation: Lipids absorb through intestinal willie.
110:33 Lipids absorb through intestinal willie. 291.
110:36 291. Plants mainly get CO from A roots, B
110:40 Plants mainly get CO from A roots, B soil, C air, D water.
110:44 soil, C air, D water. Check mark. Correct answer. C air. Right
110:48 Check mark. Correct answer. C air. Right arrow. Explanation. Air supplies CO for
110:51 arrow. Explanation. Air supplies CO for photosynthesis.
110:54 photosynthesis. 292.
110:56 292. Blood returning from body enters. A left
111:00 Blood returning from body enters. A left ventricle, B right atrium, C left
111:04 ventricle, B right atrium, C left atrium, D aort.
111:07 atrium, D aort. Check mark correct answer. B right
111:10 Check mark correct answer. B right atrium, right arrow. Explanation. Wina
111:13 atrium, right arrow. Explanation. Wina cover brings blood to right atrium.
111:17 cover brings blood to right atrium. 293.
111:19 293. The triricuspid valve is between a left
111:23 The triricuspid valve is between a left atrium and ventricle. B. Right atrium
111:26 atrium and ventricle. B. Right atrium and ventricle. C. Lungs and heart. D.
111:30 and ventricle. C. Lungs and heart. D. Heart and kidneys.
111:32 Heart and kidneys. Check mark. Correct answer. B. Right
111:35 Check mark. Correct answer. B. Right atrium and ventricle. Right arrow.
111:38 atrium and ventricle. Right arrow. Explanation. Prevents back flow into
111:40 Explanation. Prevents back flow into right atrium.
111:43 right atrium. 294.
111:45 294. Blood is red because of a melanin, b
111:49 Blood is red because of a melanin, b water, c hemoglobin, d chlorophyll.
111:54 water, c hemoglobin, d chlorophyll. Check mark. Correct answer. C.
111:56 Check mark. Correct answer. C. Hemoglobin. Right arrow. Explanation.
111:59 Hemoglobin. Right arrow. Explanation. Hemoglobin gives red color.
112:03 Hemoglobin gives red color. 295.
112:05 295. A nephron filters. A. Carbon dioxide. B.
112:10 A nephron filters. A. Carbon dioxide. B. Urine. C. Blood. D. Air. Check mark.
112:14 Urine. C. Blood. D. Air. Check mark. Correct answer. C. Blood. Right. Arrow.
112:18 Correct answer. C. Blood. Right. Arrow. Explanation. Nefrons filter blood to
112:20 Explanation. Nefrons filter blood to form urine.
112:23 form urine. 296.
112:25 296. The human urinary system removes A.
112:29 The human urinary system removes A. Sugars, B gases, C liquid waste, D
112:34 Sugars, B gases, C liquid waste, D hormones only. Check mark correct
112:37 hormones only. Check mark correct answer. C liquid waste. Right arrow
112:40 answer. C liquid waste. Right arrow explanation. Kidneys filter liquid
112:43 explanation. Kidneys filter liquid waste.
112:45 waste. 297.
112:47 297. Bile is secreted by A. Pancreas, B.
112:51 Bile is secreted by A. Pancreas, B. Liver, C. Kidney, D. Lungs.
112:56 Liver, C. Kidney, D. Lungs. Check mark. Correct answer. B. Liver.
112:59 Check mark. Correct answer. B. Liver. Right arrow. Explanation. Liver produces
113:02 Right arrow. Explanation. Liver produces bile for fat digestion.
113:05 bile for fat digestion. 298.
113:07 298. Which transports food in plants? A.
113:11 Which transports food in plants? A. Xylm. B. Roots. C. Stroometer. D. Flowm.
113:17 Xylm. B. Roots. C. Stroometer. D. Flowm. Check mark. Correct answer. D. Floe
113:20 Check mark. Correct answer. D. Floe right arrow explanation. PHM moves
113:23 right arrow explanation. PHM moves sugars throughout the plant.
113:26 sugars throughout the plant. 299.
113:28 299. Oxygen diffuses into blood from A.
113:32 Oxygen diffuses into blood from A. Broni, B. Alvoli, C trachea, D. Lungs
113:37 Broni, B. Alvoli, C trachea, D. Lungs only. Check mark. Correct answer. B.
113:41 only. Check mark. Correct answer. B. Alvoli. Right arrow. Explanation. Gas
113:44 Alvoli. Right arrow. Explanation. Gas exchange occurs in alvoli.
113:48 exchange occurs in alvoli. 300. The excretary product in plants
113:52 300. The excretary product in plants stored as crystals is A. Oxygen, B
113:56 stored as crystals is A. Oxygen, B glucose, C resin, D calcium oxilate.
114:01 glucose, C resin, D calcium oxilate. Check mark correct answer. D calcium
114:04 Check mark correct answer. D calcium oxilate. Right arrow. Explanation.
114:07 oxilate. Right arrow. Explanation. Plants store waste like calcium oxilate
114:10 Plants store waste like calcium oxilate crystals.
114:12 crystals. 31.
114:14 31. The energy currency of the cell is A D N
114:18 The energy currency of the cell is A D N A B R N A C AP D chlorophyll.
114:25 A B R N A C AP D chlorophyll. Check mark correct answer. C ATP. Right
114:29 Check mark correct answer. C ATP. Right arrow. Explanation. ATP stores and
114:32 arrow. Explanation. ATP stores and transfers energy for cellular processes.
114:36 transfers energy for cellular processes. 302.
114:38 302. The waste product of anorobic
114:40 The waste product of anorobic respiration in yeast is a lactic acid b
114:45 respiration in yeast is a lactic acid b water c alcohol d ura
114:50 water c alcohol d ura check mark correct answer c alcohol
114:53 check mark correct answer c alcohol right arrow explanation anorobic
114:56 right arrow explanation anorobic respiration in yeast produces alcohol
114:59 respiration in yeast produces alcohol and co
115:01 and co 303
115:03 303 ura is formed in a kidneys b lungs c
115:08 ura is formed in a kidneys b lungs c Liver D. Heart. Check mark. Correct
115:12 Liver D. Heart. Check mark. Correct answer. C. Liver. Right arrow.
115:14 answer. C. Liver. Right arrow. Explanation. The liver converts ammonia
115:17 Explanation. The liver converts ammonia to ura for excretion.
115:20 to ura for excretion. 304.
115:22 304. The liquid part of blood is a platelets,
115:26 The liquid part of blood is a platelets, b plasma, c red cells, d white cells.
115:32 b plasma, c red cells, d white cells. Check mark. Correct answer. B. Plasma.
115:35 Check mark. Correct answer. B. Plasma. Right arrow. Explanation. Plasma carries
115:38 Right arrow. Explanation. Plasma carries nutrients, hormones and waste.
115:42 nutrients, hormones and waste. 305.
115:44 305. Which gas is essential for Arabic
115:47 Which gas is essential for Arabic respiration?
115:48 respiration? A. Nitrogen. B. Oxygen. C. Hydrogen. D.
115:53 A. Nitrogen. B. Oxygen. C. Hydrogen. D. Methane.
115:55 Methane. Check mark. Correct answer. B. Oxygen.
115:58 Check mark. Correct answer. B. Oxygen. Right arrow. Explanation. Oxygen is
116:01 Right arrow. Explanation. Oxygen is required to release energy from glucose.
116:06 required to release energy from glucose. 306.
116:07 306. The small intestine absorbs nutrients
116:10 The small intestine absorbs nutrients with the help of A. Root hairs, B lentic
116:15 with the help of A. Root hairs, B lentic cells, C willie, D guard cells.
116:19 cells, C willie, D guard cells. Check mark correct answer. C willie
116:22 Check mark correct answer. C willie right arrow. Explanation. Willie
116:25 right arrow. Explanation. Willie increase surface area for absorption.
116:29 increase surface area for absorption. 37.
116:30 37. Kidneys maintain a heartbeat. B. Water
116:35 Kidneys maintain a heartbeat. B. Water balance. C. Bone strength. D. Vision.
116:39 balance. C. Bone strength. D. Vision. Check mark. Correct answer. B. Water
116:42 Check mark. Correct answer. B. Water balance. Right arrow. Explanation.
116:45 balance. Right arrow. Explanation. Kidneys control body's water and salt
116:48 Kidneys control body's water and salt levels.
116:50 levels. 38.
116:52 38. The pulmonary artery carries blood to a.
116:56 The pulmonary artery carries blood to a. Brain. B. Liver. C. Lungs. D. Kidneys.
117:01 Brain. B. Liver. C. Lungs. D. Kidneys. Check mark. Correct answer. C. Lungs.
117:04 Check mark. Correct answer. C. Lungs. Right arrow. Explanation. Pulmonary
117:07 Right arrow. Explanation. Pulmonary artery carries deoxxygenated blood to
117:10 artery carries deoxxygenated blood to lungs.
117:12 lungs. 309.
117:13 309. The pigment that traps sunlight is A.
117:17 The pigment that traps sunlight is A. Melanin. B. Chlorophyll. C. Keratin. D.
117:21 Melanin. B. Chlorophyll. C. Keratin. D. Hemoglobin.
117:23 Hemoglobin. Check mark. Correct answer. B.
117:26 Check mark. Correct answer. B. Chlorophyll. Right arrow. Explanation.
117:29 Chlorophyll. Right arrow. Explanation. Chlorophyll captures sunlight for
117:31 Chlorophyll captures sunlight for photosynthesis.
117:33 photosynthesis. 310.
117:35 310. Water moves up in plants due to A.
117:39 Water moves up in plants due to A. Transpiration pull, B gravity, C roots
117:43 Transpiration pull, B gravity, C roots only, D flowers.
117:46 only, D flowers. Check mark. Correct answer. A.
117:49 Check mark. Correct answer. A. Transpiration pull. Right arrow.
117:51 Transpiration pull. Right arrow. Explanation. Transpiration creates
117:54 Explanation. Transpiration creates suction in xyllem.
117:56 suction in xyllem. 311. The human heart beats
117:59 311. The human heart beats approximately.
118:01 approximately. A 10 times per minute, B 20 times per
118:05 A 10 times per minute, B 20 times per minute. C 72 times per minute, D 200
118:09 minute. C 72 times per minute, D 200 times per minute. Check mark correct
118:13 times per minute. Check mark correct answer. C 72 times per minute. Right
118:16 answer. C 72 times per minute. Right arrow. Explanation. Normal resting heart
118:20 arrow. Explanation. Normal resting heart rate averages 72 bpm.
118:24 rate averages 72 bpm. 312.
118:25 312. Bile is necessary for digestion of A
118:29 Bile is necessary for digestion of A proteins, B vitamins, C fats, D water.
118:35 proteins, B vitamins, C fats, D water. Check mark correct answer. C fats right
118:38 Check mark correct answer. C fats right arrow explanation. Bile emulsifies fat
118:42 arrow explanation. Bile emulsifies fat for easier digestion.
118:45 for easier digestion. 313.
118:47 313. The diaphragm is involved in A. Blood
118:50 The diaphragm is involved in A. Blood filtration, B. Digestion, C. Breathing,
118:55 filtration, B. Digestion, C. Breathing, D. Urination.
118:57 D. Urination. Check mark. Correct answer. C.
119:00 Check mark. Correct answer. C. Breathing. Right arrow. Explanation.
119:02 Breathing. Right arrow. Explanation. Diaphragm contracts and relaxes during
119:05 Diaphragm contracts and relaxes during breathing.
119:07 breathing. 314.
119:09 314. Plants excrete waste through. A. Fruits.
119:13 Plants excrete waste through. A. Fruits. B. Seeds. C. Roots. N leaves. D flowers.
119:19 B. Seeds. C. Roots. N leaves. D flowers. Check mark. Correct answer C. Roots and
119:22 Check mark. Correct answer C. Roots and leaves. Right arrow. Explanation. Plants
119:25 leaves. Right arrow. Explanation. Plants excrete wire diffusion through leaves
119:27 excrete wire diffusion through leaves and roots.
119:29 and roots. 315.
119:31 315. The right atrium receives blood from A.
119:35 The right atrium receives blood from A. Lungs, B. Liver, C body parts, D
119:40 Lungs, B. Liver, C body parts, D stomach.
119:41 stomach. Check mark. Correct answer. C body
119:44 Check mark. Correct answer. C body parts. Right arrow. Explanation. Right
119:47 parts. Right arrow. Explanation. Right atrium collects deoxxygenated blood from
119:50 atrium collects deoxxygenated blood from the body.
119:52 the body. 316.
119:54 316. In photosynthesis, oxygen comes from A.
119:58 In photosynthesis, oxygen comes from A. Soil, B. Sunlight, C. Water, D. Carbon
120:03 Soil, B. Sunlight, C. Water, D. Carbon dioxide. Check mark. Correct answer. C.
120:07 dioxide. Check mark. Correct answer. C. Water. Right arrow. Explanation. Water
120:10 Water. Right arrow. Explanation. Water splits to release oxygen during
120:12 splits to release oxygen during photosynthesis.
120:15 photosynthesis. 317.
120:17 317. The first enzyme to act on food is A.
120:21 The first enzyme to act on food is A. Lipase, B. Trison, C. Salivivery
120:24 Lipase, B. Trison, C. Salivivery amalayise, D. Pepsin.
120:27 amalayise, D. Pepsin. Check mark. Correct answer. C. Salivary
120:31 Check mark. Correct answer. C. Salivary amalayise. Right arrow. Explanation.
120:33 amalayise. Right arrow. Explanation. Saliva begins digestion of starch in the
120:36 Saliva begins digestion of starch in the mouth.
120:38 mouth. 318.
120:40 318. The pulmonary veins carry blood. A away
120:44 The pulmonary veins carry blood. A away from heart. B towards liver. C towards
120:48 from heart. B towards liver. C towards heart. D to kidneys.
120:51 heart. D to kidneys. Check mark. Correct answer. C towards
120:54 Check mark. Correct answer. C towards heart. Right arrow. Explanation.
120:56 heart. Right arrow. Explanation. Pulmonary veins bring oxygenated blood
120:59 Pulmonary veins bring oxygenated blood to the heart.
121:01 to the heart. 319.
121:03 319. The large intestine mainly absorbs. A.
121:07 The large intestine mainly absorbs. A. Fats. B. Oxygen. C. Water. D. Hormones.
121:13 Fats. B. Oxygen. C. Water. D. Hormones. Check mark. Correct answer. C. Water.
121:16 Check mark. Correct answer. C. Water. Right arrow. Explanation. Large
121:19 Right arrow. Explanation. Large intestine absorbs water and salts.
121:23 intestine absorbs water and salts. 320.
121:25 320. Which organ is called the powerhouse of
121:27 Which organ is called the powerhouse of the cell? A. Ribosome. B. Chloroplast.
121:32 the cell? A. Ribosome. B. Chloroplast. C. Mitochondria. D. GG. Body. Check
121:37 C. Mitochondria. D. GG. Body. Check mark. Correct answer. C. Mitochondria.
121:40 mark. Correct answer. C. Mitochondria. Right arrow. Explanation: Mitochondria
121:43 Right arrow. Explanation: Mitochondria generate cellular energy is ATP.
121:47 generate cellular energy is ATP. 321
121:50 321 Blood is filtered in A. Nefrons, B.
121:53 Blood is filtered in A. Nefrons, B. Willie, C. Stometer, D. Lentic cells.
121:58 Willie, C. Stometer, D. Lentic cells. Check mark. Correct answer. A. Nefrons.
122:01 Check mark. Correct answer. A. Nefrons. Right arrow. Explanation. Nefrons in
122:04 Right arrow. Explanation. Nefrons in kidneys filter blood.
122:07 kidneys filter blood. 322.
122:10 322. The tube carrying urine out of the body
122:12 The tube carrying urine out of the body is A ureita, B urethra, C nephron, D
122:18 is A ureita, B urethra, C nephron, D bronchule.
122:20 bronchule. Check mark. Correct answer. B ureitra.
122:23 Check mark. Correct answer. B ureitra. Right arrow. Explanation. Urethra expels
122:27 Right arrow. Explanation. Urethra expels urine from the bladder.
122:29 urine from the bladder. 323.
122:32 323. Exhaled air contains more. A. Oxygen. B.
122:36 Exhaled air contains more. A. Oxygen. B. Nitrogen. C. Hydrogen. D. Carbon
122:40 Nitrogen. C. Hydrogen. D. Carbon dioxide.
122:42 dioxide. Check mark. Correct answer. D. Carbon
122:45 Check mark. Correct answer. D. Carbon dioxide. Right arrow. Explanation.
122:48 dioxide. Right arrow. Explanation. Respiration increases CO content in
122:51 Respiration increases CO content in exhaled air.
122:53 exhaled air. 324.
122:55 324. Plants lose excess water through A.
122:59 Plants lose excess water through A. Photosynthesis, B. Transpiration, C
123:03 Photosynthesis, B. Transpiration, C respiration, D reproduction.
123:06 respiration, D reproduction. Check mark. Correct answer B.
123:09 Check mark. Correct answer B. Transpiration right arrow. Explanation.
123:12 Transpiration right arrow. Explanation. Transpiration releases water vapor
123:15 Transpiration releases water vapor through stoometer.
123:17 through stoometer. 325.
123:20 325. The upper chambers of the heart are
123:22 The upper chambers of the heart are called A. Ventricles, B atria, C alvoli,
123:27 called A. Ventricles, B atria, C alvoli, D nephrons.
123:30 D nephrons. Check mark correct answer. B atria right
123:33 Check mark correct answer. B atria right arrow. Explanation. Atria receive blood
123:36 arrow. Explanation. Atria receive blood entering the heart.
123:39 entering the heart. 326.
123:41 326. The organ producing insulin is A. Liver,
123:46 The organ producing insulin is A. Liver, B. Kidney, C pancreas, D lungs.
123:51 B. Kidney, C pancreas, D lungs. Check mark. Correct answer. C. Pancreas.
123:54 Check mark. Correct answer. C. Pancreas. Right arrow. Explanation. Insulin
123:57 Right arrow. Explanation. Insulin regulates blood glucose levels.
124:00 regulates blood glucose levels. 327.
124:03 327. Lipase digests. A proteins, B. Sugars, C
124:08 Lipase digests. A proteins, B. Sugars, C fats, D. Minerals.
124:12 fats, D. Minerals. Check mark. Correct answer. C. Fats.
124:15 Check mark. Correct answer. C. Fats. Right arrow. Explanation. Lipase breaks
124:18 Right arrow. Explanation. Lipase breaks down fats into fatty acids.
124:22 down fats into fatty acids. 328.
124:24 328. Broni connect trachea to A. Stomach. B.
124:29 Broni connect trachea to A. Stomach. B. Heart. C. Lungs. D. Kidneys.
124:33 Heart. C. Lungs. D. Kidneys. Check mark. Correct answer. C. Lungs.
124:36 Check mark. Correct answer. C. Lungs. Right arrow. Explanation. Bronai carry
124:39 Right arrow. Explanation. Bronai carry air into lungs.
124:42 air into lungs. 329.
124:44 329. Guard cells control opening off. A.
124:48 Guard cells control opening off. A. Roots. B. Flowers. C. Stoometer. D.
124:52 Roots. B. Flowers. C. Stoometer. D. Seeds.
124:54 Seeds. Check mark. Correct answer. C. Sto.
124:57 Check mark. Correct answer. C. Sto. Right arrow. Explanation. God cells
125:00 Right arrow. Explanation. God cells regulate stomatal opening.
125:04 regulate stomatal opening. 330
125:06 330 plants use sunlight to produce A.
125:09 plants use sunlight to produce A. Protein, B glucose, C ura, D fat.
125:15 Protein, B glucose, C ura, D fat. Check mark. Correct answer. B. Glucose.
125:18 Check mark. Correct answer. B. Glucose. Right arrow. Explanation. Photosynthesis
125:21 Right arrow. Explanation. Photosynthesis creates glucose as food.
125:24 creates glucose as food. 331.
125:27 331. The left ventricle pumps blood to A.
125:30 The left ventricle pumps blood to A. Lungs, B body parts, C liver, D brain
125:35 Lungs, B body parts, C liver, D brain only.
125:37 only. Check mark. Correct answer. B. Body
125:40 Check mark. Correct answer. B. Body parts. Right arrow. Explanation. Left
125:43 parts. Right arrow. Explanation. Left ventricle sends oxygenated blood to the
125:46 ventricle sends oxygenated blood to the body.
125:47 body. 332.
125:50 332. Hemoglobin transports. A. Sugars. B.
125:54 Hemoglobin transports. A. Sugars. B. Oxygen. C. Hormones. D proteins
125:59 Oxygen. C. Hormones. D proteins check mark correct answer B oxygen right
126:02 check mark correct answer B oxygen right arrow explanation hemoglobin binds
126:05 arrow explanation hemoglobin binds oxygen in RBC's
126:09 oxygen in RBC's 333
126:11 333 the larynx is also called a windpipe b
126:16 the larynx is also called a windpipe b food pipe cox
126:19 food pipe cox D kidney
126:21 D kidney check mark correct answer C voice box
126:24 check mark correct answer C voice box right arrow explanation
126:26 right arrow explanation Larynx houses vocal cords for sound
126:29 Larynx houses vocal cords for sound production.
126:31 production. 334
126:34 334 veins carry blood. A away from heart. B
126:38 veins carry blood. A away from heart. B to the heart. C only to lungs. D into
126:42 to the heart. C only to lungs. D into stomach. Check mark. Correct answer. B
126:45 stomach. Check mark. Correct answer. B to the heart. Right arrow. Explanation.
126:48 to the heart. Right arrow. Explanation. Veins return blood to the heart.
126:51 Veins return blood to the heart. 335.
126:54 335. Excess amino acids are converted into A
126:58 Excess amino acids are converted into A glucose only, B fat only, C ura, D
127:03 glucose only, B fat only, C ura, D vitamins.
127:05 vitamins. Check mark correct answer. C ura. Right
127:08 Check mark correct answer. C ura. Right arrow. Explanation. Liver converts
127:11 arrow. Explanation. Liver converts excess amino acids into ura.
127:15 excess amino acids into ura. 336.
127:18 336. The trachea is also called A food pipe,
127:22 The trachea is also called A food pipe, B windpipe, C voice box, D blood vessel.
127:28 B windpipe, C voice box, D blood vessel. Check mark correct answer. B windpipe.
127:31 Check mark correct answer. B windpipe. Right arrow explanation. Trickier
127:34 Right arrow explanation. Trickier carries air to the lungs.
127:37 carries air to the lungs. 337.
127:39 337. The liquid that emulsifies fats is A.
127:43 The liquid that emulsifies fats is A. Plasma, B. Bile, C urine, D saliva.
127:49 Plasma, B. Bile, C urine, D saliva. Check mark. Correct answer. Bile. Right
127:52 Check mark. Correct answer. Bile. Right arrow. Explanation. Bile breaks fat into
127:56 arrow. Explanation. Bile breaks fat into tiny droplets.
127:58 tiny droplets. 338.
128:01 338. The lungs are part of A. Digestive
128:04 The lungs are part of A. Digestive system, B. Excitary system, C. Nervous
128:08 system, B. Excitary system, C. Nervous system, D. Respiratory system.
128:12 system, D. Respiratory system. Check mark. Correct answer. D.
128:14 Check mark. Correct answer. D. Respiratory system. Right arrow.
128:16 Respiratory system. Right arrow. Explanation. Lungs exchange gases for
128:20 Explanation. Lungs exchange gases for breathing.
128:21 breathing. 339.
128:24 339. Glomialis filters. A. Blood. B. Air. C.
128:29 Glomialis filters. A. Blood. B. Air. C. Food. D. Sweat. Check mark. Correct
128:33 Food. D. Sweat. Check mark. Correct answer. A blood right arrow explanation.
128:37 answer. A blood right arrow explanation. Glomealis filters waste from blood in
128:39 Glomealis filters waste from blood in kidneys.
128:41 kidneys. 340.
128:43 340. ATP stands for A. Adinine triphosphate.
128:48 ATP stands for A. Adinine triphosphate. B. Adenosine triphosphate. C. Amino
128:51 B. Adenosine triphosphate. C. Amino triphosphate. D. Adenosine tetrad.
128:55 triphosphate. D. Adenosine tetrad. Check mark. Correct answer. B. Adenosine
128:58 Check mark. Correct answer. B. Adenosine triphosphate. Right arrow. Explanation.
129:01 triphosphate. Right arrow. Explanation. ATP stores chemical energy in cells.
129:06 ATP stores chemical energy in cells. 341
129:08 341 transpiration helps in A food
129:11 transpiration helps in A food production, B DNA replication, C cooling
129:16 production, B DNA replication, C cooling the plant, D nitrogen fuxation.
129:20 the plant, D nitrogen fuxation. Check mark correct answer. C. Cooling
129:23 Check mark correct answer. C. Cooling the plant. Right arrow. Explanation.
129:26 the plant. Right arrow. Explanation. Evaporation of water cools leaves.
129:30 Evaporation of water cools leaves. 342.
129:32 342. Which blood vessels have valves?
129:35 Which blood vessels have valves? A. Arteries. B. Wes. C. Capillaries. D.
129:40 A. Arteries. B. Wes. C. Capillaries. D. Alvoli.
129:42 Alvoli. Check mark. Correct answer. B. Waines.
129:45 Check mark. Correct answer. B. Waines. Right arrow. Explanation. Valves prevent
129:48 Right arrow. Explanation. Valves prevent backflow in veins.
129:51 backflow in veins. 343.
129:53 343. An aerobic respiration produces A
129:57 An aerobic respiration produces A oxygen, B lactic acid, C ATP only, D
130:03 oxygen, B lactic acid, C ATP only, D proteins.
130:04 proteins. Check mark correct answer. B lactic
130:08 Check mark correct answer. B lactic acid. Right arrow. Explanation. Anorobic
130:11 acid. Right arrow. Explanation. Anorobic respiration forms lactic acid in
130:14 respiration forms lactic acid in muscles.
130:16 muscles. 344.
130:18 344. Fatty acids and glycerol are endroducts
130:21 Fatty acids and glycerol are endroducts of A protein digestion, B fat digestion,
130:27 of A protein digestion, B fat digestion, C starch digestion, D vitamin digestion.
130:32 C starch digestion, D vitamin digestion. Check mark correct answer. B fat
130:35 Check mark correct answer. B fat digestion. Right arrow explanation.
130:38 digestion. Right arrow explanation. Lipase breaks fats into fatty acids and
130:41 Lipase breaks fats into fatty acids and glycerol.
130:43 glycerol. 345.
130:45 345. Veins carry blood under A. High
130:48 Veins carry blood under A. High pressure, B medium pressure, C low
130:52 pressure, B medium pressure, C low pressure, D no pressure.
130:55 pressure, D no pressure. Check mark correct answer. C low
130:58 Check mark correct answer. C low pressure. Right arrow. Explanation. Ways
131:01 pressure. Right arrow. Explanation. Ways transport blood at low pressure.
131:04 transport blood at low pressure. 346.
131:07 346. The left atrium receives blood from A.
131:11 The left atrium receives blood from A. Lungs, B. Liver, C. Brain, D. Kidneys.
131:17 Lungs, B. Liver, C. Brain, D. Kidneys. Check mark. Correct answer. A. Lungs.
131:20 Check mark. Correct answer. A. Lungs. Right arrow. Explanation. Pulmonary
131:22 Right arrow. Explanation. Pulmonary veins deliver oxygenated blood to left
131:25 veins deliver oxygenated blood to left atrium.
131:27 atrium. 347.
131:30 347. The gallbladder releases bile into a
131:34 The gallbladder releases bile into a stomach, B mouth, C small intestine, D
131:38 stomach, B mouth, C small intestine, D large intestine.
131:41 large intestine. Check mark. Correct answer. C. Small
131:44 Check mark. Correct answer. C. Small intestine. Right arrow. Explanation.
131:47 intestine. Right arrow. Explanation. Bile. Aids fat digestion in small
131:49 Bile. Aids fat digestion in small intestine.
131:51 intestine. 348.
131:54 348. The main component of exhaled air is a
131:58 The main component of exhaled air is a oxygen, b nitrogen, c carbon dioxide, d
132:03 oxygen, b nitrogen, c carbon dioxide, d hydrogen.
132:05 hydrogen. Check mark. Correct answer. C. Carbon
132:08 Check mark. Correct answer. C. Carbon dioxide. Right arrow. Explanation:
132:11 dioxide. Right arrow. Explanation: Co-inccreases in exhaled air.
132:14 Co-inccreases in exhaled air. 349.
132:17 349. Food moves through the esophagus by A.
132:20 Food moves through the esophagus by A. Diffusion, B. Osmosis, C paristalsis, D
132:25 Diffusion, B. Osmosis, C paristalsis, D filtration.
132:27 filtration. Check mark. Correct answer. C.
132:30 Check mark. Correct answer. C. Paristalysis. Right arrow. Explanation.
132:33 Paristalysis. Right arrow. Explanation. Paristoic movements push food down.
132:37 Paristoic movements push food down. 350.
132:39 350. The respiratory system supplies A.
132:42 The respiratory system supplies A. Nitrogen, B oxygen, C ura, D salts.
132:48 Nitrogen, B oxygen, C ura, D salts. Check mark. Correct answer. B. Oxygen.
132:52 Check mark. Correct answer. B. Oxygen. Right arrow. Explanation. Lungs provide
132:55 Right arrow. Explanation. Lungs provide oxygen for body functions.
132:58 oxygen for body functions. 351.
133:01 351. Which is the structural and functional
133:03 Which is the structural and functional unit of kidney? A. Neuron. B. Nefron. C.
133:08 unit of kidney? A. Neuron. B. Nefron. C. Broncus D. Willie.
133:11 Broncus D. Willie. Check mark. Correct answer. B. Nefron.
133:14 Check mark. Correct answer. B. Nefron. Right arrow. Explanation. Nefrons filter
133:17 Right arrow. Explanation. Nefrons filter blood to produce urine.
133:20 blood to produce urine. 352.
133:22 352. The organ involved in detoxification is
133:26 The organ involved in detoxification is A. Kidney, B lungs, C liver, D heart.
133:32 A. Kidney, B lungs, C liver, D heart. Check mark. Correct answer. C liver.
133:35 Check mark. Correct answer. C liver. Right arrow. Explanation. The liver
133:38 Right arrow. Explanation. The liver neutralizes harmful substances.
133:42 neutralizes harmful substances. 353.
133:44 353. The voice box is also known as A.
133:48 The voice box is also known as A. Farings, B larynx, C trachea, D
133:52 Farings, B larynx, C trachea, D bronchus.
133:54 bronchus. Check mark. Correct answer. B. Larynx.
133:57 Check mark. Correct answer. B. Larynx. Right arrow. Explanation. Larynx
134:00 Right arrow. Explanation. Larynx contains vocal cords.
134:03 contains vocal cords. 354.
134:06 354. Water transport in plants occurs through
134:09 Water transport in plants occurs through A flim, B roots only, C stometer, D X
134:15 A flim, B roots only, C stometer, D X zyllem.
134:16 zyllem. Check mark correct answer. D X zyllem.
134:19 Check mark correct answer. D X zyllem. Right arrow explanation. Xyle conducts
134:23 Right arrow explanation. Xyle conducts water and minerals.
134:25 water and minerals. 355.
134:28 355. Saliva breaks down. A. Proteins. B.
134:32 Saliva breaks down. A. Proteins. B. Fats. C. Star starch. D. Vitamins.
134:37 Fats. C. Star starch. D. Vitamins. Check mark. Correct answer. C. Star
134:40 Check mark. Correct answer. C. Star starch. Right arrow. Explanation.
134:42 starch. Right arrow. Explanation. Salivary amalayise convert starch to
134:45 Salivary amalayise convert starch to sugars.
134:47 sugars. 356.
134:49 356. The walls of alvoli.
134:52 The walls of alvoli. A. Thick and muscular. B. Thin and
134:55 A. Thick and muscular. B. Thin and moist. C. Hard and dry. D. Rough and
134:59 moist. C. Hard and dry. D. Rough and rigid.
135:00 rigid. Check mark. Correct answer. B. Thin and
135:03 Check mark. Correct answer. B. Thin and moist. Right arrow explanation. Thin
135:06 moist. Right arrow explanation. Thin walls aid gas exchange.
135:10 walls aid gas exchange. 357.
135:12 357. Lymph transports. A. Gases only. B. Fat
135:17 Lymph transports. A. Gases only. B. Fat molecules. C. Iron only. D. Calcium
135:21 molecules. C. Iron only. D. Calcium only.
135:23 only. Check mark. Correct answer. B. Fat
135:26 Check mark. Correct answer. B. Fat molecules. Right arrow. Explanation.
135:29 molecules. Right arrow. Explanation. Lymph carries absorbed fats from
135:31 Lymph carries absorbed fats from intestine.
135:33 intestine. 358.
135:35 358. The renal artery carries blood to a
135:39 The renal artery carries blood to a liver, B heart, C kidneys, D lungs.
135:45 liver, B heart, C kidneys, D lungs. Check mark. Correct answer. C kidneys.
135:48 Check mark. Correct answer. C kidneys. Right arrow. Explanation. Renal arteries
135:51 Right arrow. Explanation. Renal arteries supply blood to kidneys.
135:54 supply blood to kidneys. 359.
135:57 359. Carbon dioxide is carried in blood
135:59 Carbon dioxide is carried in blood mainly as a hemoglobin, B plasma
136:04 mainly as a hemoglobin, B plasma solution, C glucose, D oxygen. Check
136:08 solution, C glucose, D oxygen. Check mark correct answer, B plasma solution.
136:12 mark correct answer, B plasma solution. Right arrow explanation. Code dissolves
136:15 Right arrow explanation. Code dissolves in plasma or forms bicarbonates.
136:19 in plasma or forms bicarbonates. 360
136:21 360 plants absorb nitrogen mainly as a air b
136:26 plants absorb nitrogen mainly as a air b ammonia c nitrates d ura
136:30 ammonia c nitrates d ura check mark correct answer c nitrates
136:34 check mark correct answer c nitrates right arrow explanation nitrates are
136:37 right arrow explanation nitrates are absorbed from soil
136:39 absorbed from soil 361
136:42 361 pancreatic juice contains a hydrochloric
136:46 pancreatic juice contains a hydrochloric acid bile salts C. Enzymes for all food
136:51 acid bile salts C. Enzymes for all food types. D only water.
136:54 types. D only water. Check mark. Correct answer. C. Enzymes
136:57 Check mark. Correct answer. C. Enzymes for all food types. Right arrow.
137:00 for all food types. Right arrow. Explanation. It digests proteins, carbs,
137:03 Explanation. It digests proteins, carbs, and fats.
137:06 and fats. 362.
137:08 362. Lactic acid fermentation occurs in A.
137:12 Lactic acid fermentation occurs in A. Alvoli, B. Kidney, C. Muscle cells, D.
137:17 Alvoli, B. Kidney, C. Muscle cells, D. Brain cells.
137:19 Brain cells. Check mark. Correct answer. C. Muscle
137:22 Check mark. Correct answer. C. Muscle cells. Right arrow. Explanation. Occurs
137:25 cells. Right arrow. Explanation. Occurs during lack of oxygen in muscles.
137:29 during lack of oxygen in muscles. 363.
137:31 363. Which part controls involuntary actions?
137:35 Which part controls involuntary actions? A. Cerebrum. B. Cerebellum. C. Modella
137:40 A. Cerebrum. B. Cerebellum. C. Modella oblongata. D. Spinal cord. Check mark.
137:44 oblongata. D. Spinal cord. Check mark. Correct answer. C. Modela oblongata
137:47 Correct answer. C. Modela oblongata right arrow explanation controls
137:50 right arrow explanation controls heartbeat breathing etc.
137:54 heartbeat breathing etc. 364
137:56 364 oxygen enters blood in the A. Stomach,
138:00 oxygen enters blood in the A. Stomach, B. Alvoli, C. Triche, D. Broni.
138:05 B. Alvoli, C. Triche, D. Broni. Check mark. Correct answer. B. Alvoli.
138:09 Check mark. Correct answer. B. Alvoli. Right arrow. Explanation. Gas exchange
138:12 Right arrow. Explanation. Gas exchange happens in alvoli.
138:15 happens in alvoli. 365.
138:17 365. The walls of ways are a thick, b thin, c
138:22 The walls of ways are a thick, b thin, c rigid, d elastic only. Check mark.
138:26 rigid, d elastic only. Check mark. Correct answer. B thin. Right arrow.
138:29 Correct answer. B thin. Right arrow. Explanation: Wes have thinner walls than
138:32 Explanation: Wes have thinner walls than arteries.
138:34 arteries. 366
138:37 366 The process of losing water from leaves
138:40 The process of losing water from leaves is A. Respiration, B germination, C
138:45 is A. Respiration, B germination, C transpiration, D fermentation.
138:48 transpiration, D fermentation. Check mark correct answer. C
138:51 Check mark correct answer. C transpiration. Right arrow. Explanation.
138:54 transpiration. Right arrow. Explanation. Plants lose water through stoometer.
138:58 Plants lose water through stoometer. 367.
139:00 367. Which has the highest blood pressure? A.
139:04 Which has the highest blood pressure? A. Veins. B capillaries. C. Arteries. D.
139:08 Veins. B capillaries. C. Arteries. D. Heart only. Check mark. Correct answer.
139:12 Heart only. Check mark. Correct answer. C. Arteries. Right arrow. Explanation.
139:15 C. Arteries. Right arrow. Explanation. Arteries carry blood under high
139:17 Arteries carry blood under high pressure.
139:19 pressure. 368.
139:21 368. The functional unit of the nervous
139:24 The functional unit of the nervous system is a nephron. B. Neuron C. Willie
139:29 system is a nephron. B. Neuron C. Willie D. Lentic cells.
139:32 D. Lentic cells. Check mark. Correct answer. B. Neuron.
139:35 Check mark. Correct answer. B. Neuron. Right arrow. Explanation. Neurons
139:38 Right arrow. Explanation. Neurons transmit nerve impulses.
139:41 transmit nerve impulses. 369.
139:43 369. Photosynthesis requires a oxygen only, b
139:49 Photosynthesis requires a oxygen only, b glucose only, c sunlight, co water, d
139:54 glucose only, c sunlight, co water, d ura only.
139:56 ura only. Check mark. Correct answer. C. Sunlight.
140:00 Check mark. Correct answer. C. Sunlight. CO. Water. Right arrow. Explanation. All
140:04 CO. Water. Right arrow. Explanation. All are raw materials for photosynthesis.
140:08 are raw materials for photosynthesis. 370.
140:10 370. Excess water in body is removed by A.
140:14 Excess water in body is removed by A. Heart, B. Lungs, C kidneys, D brain.
140:19 Heart, B. Lungs, C kidneys, D brain. Check mark. Correct answer. C. Kidneys.
140:22 Check mark. Correct answer. C. Kidneys. Right arrow. Explanation. Kidneys
140:25 Right arrow. Explanation. Kidneys maintain water balance.
140:28 maintain water balance. 371.
140:31 371. Bile makes fat digestion easier by A.
140:35 Bile makes fat digestion easier by A. Heating fats, B. Cooling fats. C.
140:38 Heating fats, B. Cooling fats. C. Emulsifying fats, D. Freezing fats.
140:43 Emulsifying fats, D. Freezing fats. Check mark. Correct answer. C.
140:45 Check mark. Correct answer. C. Emulsifying fats. Right arrow.
140:48 Emulsifying fats. Right arrow. Explanation. Bile breaks fat into small
140:51 Explanation. Bile breaks fat into small droplets.
140:53 droplets. 372
140:55 372 plasma contains mostly a proteins b
141:00 plasma contains mostly a proteins b oxygen c water d fats only check mark
141:06 oxygen c water d fats only check mark correct answer c water right arrow
141:09 correct answer c water right arrow explanation plasma is about 90% water
141:14 explanation plasma is about 90% water 373
141:17 373 nefrons filter waste from a oxygen b
141:21 nefrons filter waste from a oxygen b saliva C blood. D lymph.
141:25 saliva C blood. D lymph. Check mark. Correct answer. C. Blood.
141:28 Check mark. Correct answer. C. Blood. Right arrow. Explanation. Nephrons
141:31 Right arrow. Explanation. Nephrons produce urine by filtering blood.
141:35 produce urine by filtering blood. 374.
141:37 374. Transllocation occurs in A. Xylm, B.
141:42 Transllocation occurs in A. Xylm, B. Flim, C stoometer, D guard cells.
141:47 Flim, C stoometer, D guard cells. Check mark. Correct answer. B. Flowm.
141:50 Check mark. Correct answer. B. Flowm. Right arrow. Explanation: FHM transports
141:53 Right arrow. Explanation: FHM transports food substances.
141:56 food substances. 375.
141:59 375. Hemoglobin combines with A. Nitrogen, B.
142:03 Hemoglobin combines with A. Nitrogen, B. Hydrogen, C oxygen, D carbon.
142:08 Hydrogen, C oxygen, D carbon. Check mark. Correct answer. C. Oxygen.
142:11 Check mark. Correct answer. C. Oxygen. Right arrow. Explanation. It carries
142:14 Right arrow. Explanation. It carries oxygen in blood.
142:16 oxygen in blood. 376.
142:19 376. An aerobic respiration in yeast produces
142:23 An aerobic respiration in yeast produces A. Fat, B glucose, C alcohol, D protein.
142:29 A. Fat, B glucose, C alcohol, D protein. Check mark correct answer. C alcohol.
142:33 Check mark correct answer. C alcohol. Right arrow. Explanation. Yeast
142:35 Right arrow. Explanation. Yeast fermentss sugar into alcohol.
142:39 fermentss sugar into alcohol. 377.
142:42 377. Willie are present in T. A. Stomach. B.
142:46 Willie are present in T. A. Stomach. B. Lungs. C. Small intestine, D. Large
142:50 Lungs. C. Small intestine, D. Large intestine. Check mark. Correct answer.
142:53 intestine. Check mark. Correct answer. C. Small intestine. Right arrow.
142:56 C. Small intestine. Right arrow. Explanation. Willy absorb nutrients from
142:59 Explanation. Willy absorb nutrients from food.
143:01 food. 378.
143:03 378. The food pipe is also called. A larynx,
143:07 The food pipe is also called. A larynx, B. Eophagus, C trachea, D bronchioles.
143:13 B. Eophagus, C trachea, D bronchioles. Check mark. Correct answer. B esophagus.
143:16 Check mark. Correct answer. B esophagus. Right arrow explanation carries food to
143:19 Right arrow explanation carries food to the stomach.
143:21 the stomach. 379.
143:24 379. Arteries carry blood. A to heart. B away
143:28 Arteries carry blood. A to heart. B away from heart. C only to lungs. D only to
143:32 from heart. C only to lungs. D only to liver. Check mark. Correct answer. B
143:36 liver. Check mark. Correct answer. B away from heart. Right arrow.
143:38 away from heart. Right arrow. Explanation. Arteries take blood away
143:41 Explanation. Arteries take blood away from the heart.
143:43 from the heart. 380.
143:45 380. The kidneys help regulate. A body
143:49 The kidneys help regulate. A body weight, B blood pressure, C hair growth,
143:53 weight, B blood pressure, C hair growth, D bone length. Check mark correct
143:56 D bone length. Check mark correct answer. B blood pressure. Right arrow.
143:59 answer. B blood pressure. Right arrow. Explanation. Kidneys help control blood
144:03 Explanation. Kidneys help control blood volume and pressure.
144:05 volume and pressure. 381.
144:08 381. Guard cells surround. A. Xylm. B. Flim.
144:12 Guard cells surround. A. Xylm. B. Flim. C. Stoer. D. Flowers.
144:16 C. Stoer. D. Flowers. Check mark. Correct answer. C. Stoter.
144:20 Check mark. Correct answer. C. Stoter. Right arrow. Explanation. Guard cells.
144:22 Right arrow. Explanation. Guard cells. Open and close. Stoometer.
144:25 Open and close. Stoometer. 382.
144:28 382. Blood clotting involves A. White cells.
144:32 Blood clotting involves A. White cells. B. Platelets. C. Plasma only. D. Lungs.
144:37 B. Platelets. C. Plasma only. D. Lungs. Check mark. Correct answer. B.
144:40 Check mark. Correct answer. B. Platelets. Right arrow. Explanation.
144:43 Platelets. Right arrow. Explanation. Platelets help stop bleeding.
144:46 Platelets help stop bleeding. 383.
144:49 383. Starch digestion starts in A. Stomach, B
144:53 Starch digestion starts in A. Stomach, B mouth, C liver, D kidney.
144:57 mouth, C liver, D kidney. Check mark. Correct answer. B mouth.
145:00 Check mark. Correct answer. B mouth. Right arrow. Explanation. Salivary
145:03 Right arrow. Explanation. Salivary amalayise begins starch breakdown.
145:07 amalayise begins starch breakdown. 384.
145:09 384. Exhaled air is rich in A oxygen, B
145:14 Exhaled air is rich in A oxygen, B carbon dioxide, C hydrogen, D nitrogen
145:18 carbon dioxide, C hydrogen, D nitrogen only. Check mark correct answer. B
145:22 only. Check mark correct answer. B carbon dioxide. Right arrow.
145:24 carbon dioxide. Right arrow. Explanation. Respiration releases CO.
145:29 Explanation. Respiration releases CO. 385.
145:31 385. The renal vein carries blood. A. From
145:35 The renal vein carries blood. A. From heart to kidneys. B. From kidneys to
145:38 heart to kidneys. B. From kidneys to heart. C only to liver. D only to lungs.
145:43 heart. C only to liver. D only to lungs. Check mark. Correct answer. B. From
145:46 Check mark. Correct answer. B. From kidneys to heart. Right arrow.
145:48 kidneys to heart. Right arrow. Explanation. Renal vein returns filtered
145:51 Explanation. Renal vein returns filtered blood to heart.
145:53 blood to heart. 386.
145:56 386. Food is pushed along the gut by A.
145:59 Food is pushed along the gut by A. Breathing, B. Paristalsis, C. Sweating,
146:03 Breathing, B. Paristalsis, C. Sweating, D evaporation.
146:06 D evaporation. Check mark. Correct answer. B.
146:08 Check mark. Correct answer. B. Paristalsis right arrow explanation.
146:11 Paristalsis right arrow explanation. Muscle contractions move food.
146:15 Muscle contractions move food. 387.
146:17 387. Gaseous exchange in plants takes place
146:20 Gaseous exchange in plants takes place through A. PHM. B. Xylm. C. Stoometer.
146:26 through A. PHM. B. Xylm. C. Stoometer. D. Roots only.
146:28 D. Roots only. Check mark. Correct answer. C. Stoter.
146:31 Check mark. Correct answer. C. Stoter. Right arrow. Explanation. Stoer. Allow
146:35 Right arrow. Explanation. Stoer. Allow gases to enter or leave.
146:38 gases to enter or leave. 388.
146:40 388. Which pigment gives plants green color?
146:44 Which pigment gives plants green color? A. Hemoglobin. B. Melanin. C.
146:47 A. Hemoglobin. B. Melanin. C. Chlorophyll. D. Xanthophil.
146:51 Chlorophyll. D. Xanthophil. Check mark. Correct answer. C.
146:53 Check mark. Correct answer. C. Chlorophyll. Right arrow. Explanation.
146:56 Chlorophyll. Right arrow. Explanation. Chlorophyll reflects green light.
146:59 Chlorophyll reflects green light. 389.
147:02 389. In an aerobic respiration, energy is
147:05 In an aerobic respiration, energy is released. A completely, B partially, C
147:10 released. A completely, B partially, C not at all. D very slowly.
147:14 not at all. D very slowly. Check mark. Correct answer. B partially
147:17 Check mark. Correct answer. B partially right arrow. Explanation. An aerobic
147:20 right arrow. Explanation. An aerobic respiration yields less energy.
147:23 respiration yields less energy. 390.
147:25 390. Pulmonary circulation involves A. Heart
147:29 Pulmonary circulation involves A. Heart and kidneys, B. Heart and lungs. C.
147:33 and kidneys, B. Heart and lungs. C. Lungs and liver. D. Liver and stomach.
147:37 Lungs and liver. D. Liver and stomach. Check mark. Correct answer. B. Heart and
147:40 Check mark. Correct answer. B. Heart and lungs. Right arrow. Explanation.
147:43 lungs. Right arrow. Explanation. Pulmonary circulation moves blood
147:45 Pulmonary circulation moves blood through lungs.
147:47 through lungs. 391.
147:50 391. Bile is stored in A. Liver, B. Pancreas,
147:54 Bile is stored in A. Liver, B. Pancreas, C gall bladder, D kidney.
147:58 C gall bladder, D kidney. Check mark. Correct answer. C. Gall
148:01 Check mark. Correct answer. C. Gall bladder right arrow explanation bile is
148:04 bladder right arrow explanation bile is stored until needed.
148:07 stored until needed. 392
148:09 392 oxygenated blood flows through A.
148:12 oxygenated blood flows through A. Pulmonary artery B. Right atrium C.
148:16 Pulmonary artery B. Right atrium C. Pulmonary veins. D wina cara.
148:20 Pulmonary veins. D wina cara. Check mark. Correct answer. C. Pulmonary
148:24 Check mark. Correct answer. C. Pulmonary veins. Right arrow. Explanation.
148:26 veins. Right arrow. Explanation. Pulmonary veins carry oxygenated blood
148:29 Pulmonary veins carry oxygenated blood to heart.
148:31 to heart. 393.
148:33 393. The main excretory product in humans is
148:37 The main excretory product in humans is A. Alcohol, B. Oxygen, C ura, D fat.
148:43 A. Alcohol, B. Oxygen, C ura, D fat. Check mark. Correct answer. C. URA.
148:47 Check mark. Correct answer. C. URA. Right arrow. Explanation. URA is removed
148:50 Right arrow. Explanation. URA is removed by kidneys.
148:52 by kidneys. 394
148:55 394 veins contain A valves, B chlorophyll, C
149:00 veins contain A valves, B chlorophyll, C pelia, D root hairs.
149:03 pelia, D root hairs. Check mark correct answer. A valves
149:06 Check mark correct answer. A valves right arrow. Explanation. Valves prevent
149:09 right arrow. Explanation. Valves prevent backflow in veins.
149:12 backflow in veins. 395.
149:15 395. Air enters the lungs through A. E
149:18 Air enters the lungs through A. E esophagus. B trachea. C. Kidneys. D.
149:23 esophagus. B trachea. C. Kidneys. D. Liver check mark. Correct answer. B.
149:26 Liver check mark. Correct answer. B. Trickier. Right arrow. Explanation.
149:28 Trickier. Right arrow. Explanation. Trickia conducts air into lungs.
149:32 Trickia conducts air into lungs. 396.
149:34 396. Plants use carbon dioxide during A.
149:38 Plants use carbon dioxide during A. Germination. B. Photosynthesis. C.
149:42 Germination. B. Photosynthesis. C. Respiration only. D. Reproduction only.
149:47 Respiration only. D. Reproduction only. Check mark. Correct answer. B.
149:49 Check mark. Correct answer. B. Photosynthesis. Right arrow.
149:51 Photosynthesis. Right arrow. Explanation: Co is a raw material for
149:54 Explanation: Co is a raw material for making food.
149:56 making food. 397
149:59 397 Hemoglobin contains A. Sodium, B iron,
150:04 Hemoglobin contains A. Sodium, B iron, C. Calcium, D zinc.
150:07 C. Calcium, D zinc. Check mark. Correct answer. B. Iron.
150:10 Check mark. Correct answer. B. Iron. Right arrow. Explanation. Iron binds
150:13 Right arrow. Explanation. Iron binds oxygen in hemoglobin.
150:16 oxygen in hemoglobin. 398.
150:19 398. Oxygen diffuses into A urine, B sweat, C
150:24 Oxygen diffuses into A urine, B sweat, C blood capillaries, D hair cells.
150:28 blood capillaries, D hair cells. Check mark correct answer. C blood
150:31 Check mark correct answer. C blood capillaries. Right arrow. Explanation.
150:34 capillaries. Right arrow. Explanation. Oxygen enters blood in alvoli.
150:38 Oxygen enters blood in alvoli. 399.
150:41 399. An aerobic respiration occurs in A. Only
150:44 An aerobic respiration occurs in A. Only humans. B. Absence of oxygen. C. High
150:49 humans. B. Absence of oxygen. C. High oxygen supply. D. Water only.
150:53 oxygen supply. D. Water only. Check mark. Correct answer. B. Absence
150:56 Check mark. Correct answer. B. Absence of oxygen. Right arrow. Explanation. An
150:59 of oxygen. Right arrow. Explanation. An aerobic respiration needs no oxygen.
151:03 aerobic respiration needs no oxygen. 400. Fat is stored in the body as a
151:08 400. Fat is stored in the body as a starch, B glycogen, C adipose tissue, D
151:13 starch, B glycogen, C adipose tissue, D water.
151:14 water. Check mark correct answer. C adipose
151:18 Check mark correct answer. C adipose tissue. Right arrow. Explanation. Excess
151:21 tissue. Right arrow. Explanation. Excess fat accumulates in fat cells.
151:24 fat accumulates in fat cells. 41.
151:26 41. The dark reaction of photosynthesis is
151:29 The dark reaction of photosynthesis is also called A. Krebs cycle B. Calvin
151:33 also called A. Krebs cycle B. Calvin cycle. C. Glycolysis. D. Fermentation.
151:39 cycle. C. Glycolysis. D. Fermentation. Check mark. Correct answer. B. Calvin
151:42 Check mark. Correct answer. B. Calvin cycle. Right arrow. Explanation. Calvin
151:45 cycle. Right arrow. Explanation. Calvin cycle fixes CO into glucose.
151:49 cycle fixes CO into glucose. 42.
151:50 42. The main purpose of respiration is to A
151:54 The main purpose of respiration is to A produce heat only. B produce energy. C
151:59 produce heat only. B produce energy. C absorb nitrogen. D store water.
152:03 absorb nitrogen. D store water. Check mark. Correct answer. B. Produce
152:06 Check mark. Correct answer. B. Produce energy. Right arrow. Explanation.
152:09 energy. Right arrow. Explanation. Respiration releases energy from food.
152:13 Respiration releases energy from food. 43.
152:15 43. The kidney filters blood at a structure
152:17 The kidney filters blood at a structure called A. Alvolus, B. Nefron, C. Willis,
152:23 called A. Alvolus, B. Nefron, C. Willis, D. Bronchol.
152:25 D. Bronchol. Check mark. Correct answer. B. Nefron.
152:28 Check mark. Correct answer. B. Nefron. Right arrow. Explanation. Nephrons
152:31 Right arrow. Explanation. Nephrons filter wastes to form urine.
152:34 filter wastes to form urine. 44.
152:36 44. The breakdown of glucose into pyrovate
152:39 The breakdown of glucose into pyrovate occurs in A. Mitochondria, B. Nucleus, C
152:44 occurs in A. Mitochondria, B. Nucleus, C cytoplasm, D. Ribosomes.
152:48 cytoplasm, D. Ribosomes. Check mark. Correct answer. C.
152:51 Check mark. Correct answer. C. Cytoplasm. Right arrow. Explanation.
152:54 Cytoplasm. Right arrow. Explanation. Glycolysis takes place in cytoplasm.
152:58 Glycolysis takes place in cytoplasm. 45.
153:00 45. The oxygen liberated during
153:02 The oxygen liberated during photosynthesis comes from A CO B
153:07 photosynthesis comes from A CO B chlorophyll C water D glucose.
153:12 chlorophyll C water D glucose. Check mark correct answer C water. Right
153:15 Check mark correct answer C water. Right arrow explanation water splitting
153:18 arrow explanation water splitting releases oxygen.
153:20 releases oxygen. 46.
153:22 46. The muscular organ that stores urine. A
153:26 The muscular organ that stores urine. A kidney, B. Bladder, C. Lungs, D. Liver.
153:32 kidney, B. Bladder, C. Lungs, D. Liver. Check mark. Correct answer. B. Bladder.
153:35 Check mark. Correct answer. B. Bladder. Right arrow. Explanation. Bladder stores
153:38 Right arrow. Explanation. Bladder stores urine temporarily.
153:41 urine temporarily. 47.
153:43 47. Which is the universal solvent?
153:46 Which is the universal solvent? A. Alcohol. B. Oil. C. Water. D. Petrol.
153:52 A. Alcohol. B. Oil. C. Water. D. Petrol. Check mark. Correct answer. C. Water.
153:55 Check mark. Correct answer. C. Water. Right arrow. Explanation. Water
153:58 Right arrow. Explanation. Water dissolves most substances.
154:01 dissolves most substances. 48.
154:03 48. Pepsin acts in A. Mouth. B. Stomach. C.
154:08 Pepsin acts in A. Mouth. B. Stomach. C. Small intestine. D. Large intestine.
154:12 Small intestine. D. Large intestine. Check mark. Correct answer. B. Stomach.
154:16 Check mark. Correct answer. B. Stomach. Right arrow. Explanation. Pepsin digests
154:19 Right arrow. Explanation. Pepsin digests proteins in acidic stomach.
154:22 proteins in acidic stomach. 49.
154:24 49. The blood vessel carrying blood from
154:26 The blood vessel carrying blood from intestines to liver is A. Hpatic vein, B
154:31 intestines to liver is A. Hpatic vein, B portal vein, C pulmonary artery, D renal
154:35 portal vein, C pulmonary artery, D renal artery. Check mark. Correct answer. B
154:38 artery. Check mark. Correct answer. B portal vein. Right arrow. Explanation.
154:41 portal vein. Right arrow. Explanation. Portal vein carries nutrients from
154:44 Portal vein carries nutrients from intestines.
154:46 intestines. 410.
154:48 410. Plants store glucose as A protein, B
154:52 Plants store glucose as A protein, B starch, C fat, D vitamin.
154:56 starch, C fat, D vitamin. Check mark. Correct answer. B starch.
154:59 Check mark. Correct answer. B starch. Right arrow. Explanation. Plants convert
155:03 Right arrow. Explanation. Plants convert glucose to starch for storage.
155:06 glucose to starch for storage. 411.
155:08 411. Which pigment captures sunlight in
155:10 Which pigment captures sunlight in plants? A. Kerotene. B. Hemoglobin. C.
155:15 plants? A. Kerotene. B. Hemoglobin. C. Melanin. D. Chlorophyll.
155:18 Melanin. D. Chlorophyll. Check mark. Correct answer. D.
155:21 Check mark. Correct answer. D. Chlorophyll. Right arrow. Explanation.
155:24 Chlorophyll. Right arrow. Explanation. Chlorophyll absorbs light energy.
155:28 Chlorophyll absorbs light energy. 412.
155:29 412. The process of forming ura is called A.
155:33 The process of forming ura is called A. Glycolysis, B. URA cycle, C
155:37 Glycolysis, B. URA cycle, C photosynthesis, D transpiration.
155:41 photosynthesis, D transpiration. Check mark. Correct answer. B. URA
155:44 Check mark. Correct answer. B. URA cycle. Right arrow. Explanation: URA
155:47 cycle. Right arrow. Explanation: URA cycle converts ammonia into ura.
155:51 cycle converts ammonia into ura. 413.
155:53 413. The triricuspid valve was found between
155:56 The triricuspid valve was found between A left atrium and left ventricle. B
156:00 A left atrium and left ventricle. B right atrium and right ventricle. C
156:03 right atrium and right ventricle. C right ventricle and lungs. D left
156:06 right ventricle and lungs. D left ventricle and aort.
156:08 ventricle and aort. Check mark. Correct answer. B. Right
156:12 Check mark. Correct answer. B. Right atrium and right ventricle. Right arrow.
156:14 atrium and right ventricle. Right arrow. Explanation: Tricuspid valve prevents
156:17 Explanation: Tricuspid valve prevents backflow of blood.
156:20 backflow of blood. 414
156:22 414 The main respiratory organ in humans is
156:26 The main respiratory organ in humans is A. Nose, B. Lungs, C skin, D. Trachea.
156:32 A. Nose, B. Lungs, C skin, D. Trachea. Check mark. Correct answer. B. Lungs.
156:35 Check mark. Correct answer. B. Lungs. Right arrow. Explanation. Lungs perform
156:38 Right arrow. Explanation. Lungs perform gas exchange.
156:40 gas exchange. 415.
156:42 415. Plants get water from A air, B sun
156:46 Plants get water from A air, B sun sunlight, C soil, D bark. Check mark.
156:51 sunlight, C soil, D bark. Check mark. Correct answer. C soil. Right arrow.
156:54 Correct answer. C soil. Right arrow. Explanation. Roots absorb water from
156:57 Explanation. Roots absorb water from soil.
156:59 soil. 416.
157:01 416. A waste product of respiration is a
157:05 A waste product of respiration is a oxygen, b nitrogen, c carbon dioxide, d
157:10 oxygen, b nitrogen, c carbon dioxide, d ura.
157:12 ura. Check mark. Correct answer. C. Carbon
157:15 Check mark. Correct answer. C. Carbon dioxide. Right arrow. Explanation. Core
157:18 dioxide. Right arrow. Explanation. Core is released during respiration.
157:21 is released during respiration. 417.
157:23 417. The functional unit of lungs is A.
157:27 The functional unit of lungs is A. Bronus, B. Trachea, C. Alvolus, D.
157:31 Bronus, B. Trachea, C. Alvolus, D. Larynx.
157:33 Larynx. Check mark. Correct answer. C. Alvolus.
157:36 Check mark. Correct answer. C. Alvolus. Right arrow. Explanation. Alvoli
157:39 Right arrow. Explanation. Alvoli exchange gases with blood.
157:42 exchange gases with blood. 418.
157:44 418. Fat digestion begins in A mouth, B
157:48 Fat digestion begins in A mouth, B stomach, C small intestine, D large
157:53 stomach, C small intestine, D large intestine.
157:54 intestine. Check mark correct answer. C small
157:58 Check mark correct answer. C small intestine. Right arrow explanation. Bile
158:01 intestine. Right arrow explanation. Bile and lipase act in small intestine.
158:05 and lipase act in small intestine. 419.
158:07 419. Photosynthesis stores energy as A heat,
158:11 Photosynthesis stores energy as A heat, B light, C chemical energy, D sound.
158:16 B light, C chemical energy, D sound. Check mark correct answer. C chemical
158:19 Check mark correct answer. C chemical energy. Right arrow. Explanation. Stored
158:22 energy. Right arrow. Explanation. Stored in glucose molecules.
158:26 in glucose molecules. 420.
158:28 420. The pulmonary vein carries a oxygenated
158:32 The pulmonary vein carries a oxygenated blood, B deoxxygenated blood, C
158:35 blood, B deoxxygenated blood, C nutrients, D ura.
158:39 nutrients, D ura. Check mark correct answer. A oxygenated
158:42 Check mark correct answer. A oxygenated blood. Right arrow. Explanation.
158:44 blood. Right arrow. Explanation. Pulmonary vein returns oxygenated blood
158:47 Pulmonary vein returns oxygenated blood to heart.
158:49 to heart. 421.
158:52 421. Which is the main energy source for
158:54 Which is the main energy source for cells? A. Fat. B. protein C AP
159:00 cells? A. Fat. B. protein C AP DNA
159:02 DNA check mark correct answer C AP right
159:06 check mark correct answer C AP right arrow explanation ATP powers cell
159:10 arrow explanation ATP powers cell functions
159:12 functions 422
159:14 422 Nitrogen fluxation is done by A bacteria
159:19 Nitrogen fluxation is done by A bacteria B viruses C fungi d algae only check
159:25 B viruses C fungi d algae only check mark correct answer A bacteria right
159:28 mark correct answer A bacteria right arrow explanation nitrogen fixing
159:31 arrow explanation nitrogen fixing bacteria convert nitrogen to usable
159:34 bacteria convert nitrogen to usable form.
159:35 form. 423
159:38 423 Bile has a role in A protein digestion,
159:42 Bile has a role in A protein digestion, B fat digestion, C sugar breakdown, D
159:47 B fat digestion, C sugar breakdown, D ura formation.
159:49 ura formation. Check mark correct answer. B fat
159:52 Check mark correct answer. B fat digestion. Right arrow explanation.
159:55 digestion. Right arrow explanation. While emulsifies fats
159:58 While emulsifies fats 424
160:01 424 The pigment in RBCs is A. Chlorophyll, B
160:06 The pigment in RBCs is A. Chlorophyll, B melanin, C hemoglobin, D X zanthophil.
160:11 melanin, C hemoglobin, D X zanthophil. Check mark correct answer C hemoglobin.
160:14 Check mark correct answer C hemoglobin. Right arrow explanation. Hemoglobin
160:17 Right arrow explanation. Hemoglobin carries oxygen.
160:20 carries oxygen. 425.
160:22 425. Which cells fight infection? A. Red
160:26 Which cells fight infection? A. Red blood cells. B. White blood cells. C.
160:30 blood cells. B. White blood cells. C. Platelets. D. Nerve cells.
160:33 Platelets. D. Nerve cells. Check mark. Correct answer. B. White
160:36 Check mark. Correct answer. B. White blood cells. Right arrow. Explanation.
160:39 blood cells. Right arrow. Explanation. WBC's protect against pathogens.
160:44 WBC's protect against pathogens. 426.
160:46 426. Bronchioles end in A bronchi b alvoli c
160:52 Bronchioles end in A bronchi b alvoli c trachea d l larynx.
160:55 trachea d l larynx. Check mark correct answer. B alvoli
160:58 Check mark correct answer. B alvoli right arrow explanation. Alvoli are the
161:01 right arrow explanation. Alvoli are the gas exchange sites.
161:04 gas exchange sites. 427.
161:07 427. The double circulation system involves
161:11 The double circulation system involves A one loop, B two loops, C only veins, D
161:16 A one loop, B two loops, C only veins, D only arteries, check mark correct
161:19 only arteries, check mark correct answer, B two loops, right arrow.
161:22 answer, B two loops, right arrow. Explanation pulmonary and systemic
161:24 Explanation pulmonary and systemic circulation.
161:27 circulation. 428.
161:29 428. Glycerol is a part of A protein, B fat,
161:34 Glycerol is a part of A protein, B fat, C D N A D starch.
161:39 C D N A D starch. Check mark correct answer. B fat. Right
161:42 Check mark correct answer. B fat. Right arrow. Explanation. Fats are made of
161:45 arrow. Explanation. Fats are made of glycerol and fatty acids.
161:48 glycerol and fatty acids. 429.
161:51 429. Lungs remove. A. Glucose. B. URA. C.
161:56 Lungs remove. A. Glucose. B. URA. C. Oxygen. D. Carbon dioxide.
162:00 Oxygen. D. Carbon dioxide. Check mark. Correct answer. D. Carbon
162:03 Check mark. Correct answer. D. Carbon dioxide. Right arrow. Explanation. Lungs
162:06 dioxide. Right arrow. Explanation. Lungs expel CO during exhalation.
162:10 expel CO during exhalation. 430.
162:12 430. Which part of brain controls breathing?
162:15 Which part of brain controls breathing? A. Cerebrum. B. Cerebellum. C. Modella.
162:19 A. Cerebrum. B. Cerebellum. C. Modella. D. Spinal cord. Check mark. Correct
162:23 D. Spinal cord. Check mark. Correct answer. C. Model. Right arrow.
162:26 answer. C. Model. Right arrow. Explanation. Modela controls involuntary
162:30 Explanation. Modela controls involuntary actions.
162:32 actions. 431.
162:34 431. Oxygen diffuses into A. Blood
162:37 Oxygen diffuses into A. Blood capillaries. B. Alvolola walls only. C
162:41 capillaries. B. Alvolola walls only. C trachea only. D bronchi only. Check
162:46 trachea only. D bronchi only. Check mark. Correct answer. A. Blood
162:48 mark. Correct answer. A. Blood capillaries. Right arrow. Explanation.
162:51 capillaries. Right arrow. Explanation. Oxygen moves into blood from alvoli.
162:56 Oxygen moves into blood from alvoli. 432.
162:58 432. The small intestine absorbs food using a
163:02 The small intestine absorbs food using a trachea, b willie, c guard cells, d root
163:07 trachea, b willie, c guard cells, d root hairs.
163:09 hairs. Check mark correct answer. B willy right
163:12 Check mark correct answer. B willy right arrow explanation. Willie increase
163:15 arrow explanation. Willie increase surface for absorption.
163:18 surface for absorption. 433.
163:20 433. URA is transported in A blood plasma, B
163:25 URA is transported in A blood plasma, B red blood cells, C nerve cells, D skin
163:29 red blood cells, C nerve cells, D skin cells.
163:31 cells. Check mark correct answer. A blood
163:34 Check mark correct answer. A blood plasma. Right arrow explanation. URA
163:37 plasma. Right arrow explanation. URA dissolves in plasma.
163:40 dissolves in plasma. 434.
163:42 434. Lungs are protected by A. Stomach, B.
163:46 Lungs are protected by A. Stomach, B. Rib cage, C. Kidneys, D. Heart valves.
163:52 Rib cage, C. Kidneys, D. Heart valves. Check mark. Correct answer. B. Rib cage.
163:55 Check mark. Correct answer. B. Rib cage. Right arrow. Explanation. Ribs guard
163:58 Right arrow. Explanation. Ribs guard lungs and heart.
164:00 lungs and heart. 435.
164:03 435. The largest artery is a vein cover, b
164:07 The largest artery is a vein cover, b pulmonary vein, c aort, d hpatic vein.
164:13 pulmonary vein, c aort, d hpatic vein. Check mark. Correct answer C. AOT right
164:16 Check mark. Correct answer C. AOT right arrow explanation. AOTA carries blood
164:19 arrow explanation. AOTA carries blood from heart to body.
164:22 from heart to body. 436.
164:25 436. Fatty acids are formed by digestion of
164:28 Fatty acids are formed by digestion of A. Proteins B fats C D N A D vitamins.
164:36 A. Proteins B fats C D N A D vitamins. Check mark correct answer. B fats. Right
164:39 Check mark correct answer. B fats. Right arrow. Explanation. Lipe splits fats
164:42 arrow. Explanation. Lipe splits fats into fatty acids.
164:45 into fatty acids. 437.
164:48 437. A vein with oxygenated blood is A.
164:52 A vein with oxygenated blood is A. Pulmonary vein. B renal vein. C. Hpatic
164:56 Pulmonary vein. B renal vein. C. Hpatic vein. D jugular vein.
164:59 vein. D jugular vein. Check mark. Correct answer. A. Pulmonary
165:02 Check mark. Correct answer. A. Pulmonary vein. Right arrow. Explanation. Carries
165:06 vein. Right arrow. Explanation. Carries oxygenrich blood to heart.
165:09 oxygenrich blood to heart. 438
165:11 438 Water balance in body is maintained by A
165:15 Water balance in body is maintained by A liver B kidneys C heart D lungs
165:21 liver B kidneys C heart D lungs check mark correct answer B kidneys
165:24 check mark correct answer B kidneys right arrow explanation kidneys regulate
165:28 right arrow explanation kidneys regulate water levels
165:30 water levels 439
165:33 439 G exchange happens in A trachea B
165:37 G exchange happens in A trachea B esophagus C. Alvoli, D. Diaphragm.
165:42 esophagus C. Alvoli, D. Diaphragm. Check mark. Correct answer. C. Alvoli.
165:45 Check mark. Correct answer. C. Alvoli. Right arrow. Explanation. Thin walls
165:48 Right arrow. Explanation. Thin walls help gas diffusion.
165:51 help gas diffusion. 440.
165:53 440. Plants excrete wastes wire. A. Bile. B.
165:57 Plants excrete wastes wire. A. Bile. B. Roots and leaves. C. Hair cells. D.
166:01 Roots and leaves. C. Hair cells. D. Heart. Check mark. Correct answer. B.
166:05 Heart. Check mark. Correct answer. B. Roots and leaves. Right arrow.
166:07 Roots and leaves. Right arrow. Explanation: Waste diffuses out through
166:10 Explanation: Waste diffuses out through leaves and roots.
166:12 leaves and roots. 441.
166:15 441. The pancreas produces A. Insulin, B.
166:19 The pancreas produces A. Insulin, B. Bile, C. Oxygen, D. Sweat. Check mark.
166:24 Bile, C. Oxygen, D. Sweat. Check mark. Correct answer. A. Insulin. Right arrow.
166:27 Correct answer. A. Insulin. Right arrow. Explanation. Insulin controls blood
166:30 Explanation. Insulin controls blood sugar.
166:32 sugar. 442.
166:35 442. The food pipe leads to A liver, B
166:39 The food pipe leads to A liver, B trachea, C stomach, D heart. Check mark.
166:43 trachea, C stomach, D heart. Check mark. Correct answer. C stomach. Right arrow.
166:47 Correct answer. C stomach. Right arrow. Explanation. Esophagus ends at stomach.
166:51 Explanation. Esophagus ends at stomach. 443.
166:54 443. Excess amino acids are converted to a
166:58 Excess amino acids are converted to a fat, b ura, c carbohydrate, dna.
167:04 fat, b ura, c carbohydrate, dna. Check mark. Correct answer. B. URA.
167:07 Check mark. Correct answer. B. URA. Right arrow. Explanation. Liver
167:09 Right arrow. Explanation. Liver demonates amino acids.
167:13 demonates amino acids. 444.
167:15 444. Broni connect. A. Heart to lungs. B.
167:19 Broni connect. A. Heart to lungs. B. Nose to trachea. C. Trachea to lungs. D.
167:23 Nose to trachea. C. Trachea to lungs. D. Liver to kidney.
167:26 Liver to kidney. Check mark. Correct answer. C. Trachea
167:29 Check mark. Correct answer. C. Trachea to lungs. Right arrow. Explanation.
167:32 to lungs. Right arrow. Explanation. Bronchi branch into lungs.
167:35 Bronchi branch into lungs. 445
167:38 445 platelets help in A. Digestion, B
167:42 platelets help in A. Digestion, B breathing, C clotting, D excretion.
167:45 breathing, C clotting, D excretion. Check mark. Correct answer. C clotting.
167:49 Check mark. Correct answer. C clotting. Right arrow. Explanation. Platelets seal
167:52 Right arrow. Explanation. Platelets seal wounds.
167:54 wounds. 446.
167:56 446. In plants, CO is absorbed during A
168:00 In plants, CO is absorbed during A respiration, B transpiration, C
168:04 respiration, B transpiration, C photosynthesis, D excretion.
168:08 photosynthesis, D excretion. Check mark correct answer C
168:10 Check mark correct answer C photosynthesis. Right arrow explanation
168:13 photosynthesis. Right arrow explanation co- helps form glucose.
168:16 co- helps form glucose. 447
168:19 447 Exhaled air contains more. A water
168:22 Exhaled air contains more. A water vapor, B. Oxygen, C. Nitrogen only, D.
168:27 vapor, B. Oxygen, C. Nitrogen only, D. Protein.
168:29 Protein. Check mark. Correct answer. A. Water
168:32 Check mark. Correct answer. A. Water vapor. Right arrow. Explanation. Air
168:35 vapor. Right arrow. Explanation. Air picks moisture during respiration.
168:38 picks moisture during respiration. 448.
168:41 448. The pancreas secretes A. Hydrochloric
168:44 The pancreas secretes A. Hydrochloric acid. B. Gastric juice. C. Pancreatic
168:49 acid. B. Gastric juice. C. Pancreatic juice. D. Bile. Check mark. Correct
168:53 juice. D. Bile. Check mark. Correct answer. C. Pancreatic juice right arrow
168:56 answer. C. Pancreatic juice right arrow explanation contains enzymes for
168:59 explanation contains enzymes for digestion.
169:01 digestion. 449.
169:04 449. Arteries carry blood A at low pressure.
169:07 Arteries carry blood A at low pressure. B to kidneys only. C away from heart. D
169:12 B to kidneys only. C away from heart. D only inside liver. Check mark. Correct
169:15 only inside liver. Check mark. Correct answer. C away from heart. Right arrow.
169:19 answer. C away from heart. Right arrow. Explanation. Arteries distribute blood
169:22 Explanation. Arteries distribute blood under pressure.
169:24 under pressure. 450.
169:26 450. The pulmonary artery carries a
169:29 The pulmonary artery carries a oxygenated blood, B deoxxygenated blood,
169:33 oxygenated blood, B deoxxygenated blood, C only ura, D only hormones.
169:38 C only ura, D only hormones. Check mark correct answer. B.
169:40 Check mark correct answer. B. Deoxxygenated blood. Right arrow.
169:43 Deoxxygenated blood. Right arrow. Explanation. Pulmonary artery takes
169:46 Explanation. Pulmonary artery takes deoxxygenated blood to lungs.
169:49 deoxxygenated blood to lungs. 451.
169:52 451. What connects the fairings to the
169:54 What connects the fairings to the stomach? A trachea. B esophagus. C.
169:58 stomach? A trachea. B esophagus. C. Larynx. D. Bronus.
170:02 Larynx. D. Bronus. Check mark. Correct answer. B.
170:04 Check mark. Correct answer. B. Esophagus. Right arrow. Explanation. The
170:07 Esophagus. Right arrow. Explanation. The esophagus carries food from throat to
170:10 esophagus carries food from throat to stomach.
170:12 stomach. 452.
170:14 452. Red blood cells are produced in A.
170:18 Red blood cells are produced in A. Kidneys. B. Bone marrow. C. Lungs. D.
170:22 Kidneys. B. Bone marrow. C. Lungs. D. Liver. Check mark. Correct answer. B.
170:26 Liver. Check mark. Correct answer. B. Bone marrow. Right arrow. Explanation.
170:29 Bone marrow. Right arrow. Explanation. Bone marrow makes new blood cells.
170:33 Bone marrow makes new blood cells. 453.
170:35 453. The enzyme breaking proteins in the
170:38 The enzyme breaking proteins in the stomach is A. Lipase, B. Pepsin, C
170:42 stomach is A. Lipase, B. Pepsin, C amilase, D. Lactase.
170:46 amilase, D. Lactase. Check mark. Correct answer. B. Pepsin.
170:49 Check mark. Correct answer. B. Pepsin. Right arrow. Explanation: Pepsin digests
170:52 Right arrow. Explanation: Pepsin digests proteins in acidic stomach.
170:56 proteins in acidic stomach. 454.
170:58 454. Diaphragm movement helps in A.
171:01 Diaphragm movement helps in A. Digestion, B urination, C breathing, D
171:06 Digestion, B urination, C breathing, D circulation.
171:08 circulation. Check mark. Correct answer. C.
171:10 Check mark. Correct answer. C. Breathing. Right arrow. Explanation.
171:13 Breathing. Right arrow. Explanation. Diaphragm contracts to pull air into
171:16 Diaphragm contracts to pull air into lungs.
171:18 lungs. 455.
171:20 455. The lungs contain millions of A.
171:23 The lungs contain millions of A. Nefrons, B. Willie, C alvoli, D axons.
171:30 Nefrons, B. Willie, C alvoli, D axons. Check mark correct answer. C alvoli
171:33 Check mark correct answer. C alvoli right arrow. Explanation. Alvoli provide
171:36 right arrow. Explanation. Alvoli provide surface for gas exchange.
171:39 surface for gas exchange. 456.
171:42 456. Blood enters the heart through A.
171:45 Blood enters the heart through A. Arteries, B capillaries, C veins, D
171:50 Arteries, B capillaries, C veins, D bronchi.
171:51 bronchi. Check mark. Correct answer. C Wayne's
171:54 Check mark. Correct answer. C Wayne's right arrow. Explanation. Wes bring
171:58 right arrow. Explanation. Wes bring blood back to heart.
172:00 blood back to heart. 457.
172:03 457. Plants excrete wastes through A. Liver,
172:06 Plants excrete wastes through A. Liver, B. Alvoli, C. Stoometer D. Trickier.
172:12 B. Alvoli, C. Stoometer D. Trickier. Check mark. Correct answer. C. Stoter.
172:15 Check mark. Correct answer. C. Stoter. Right arrow. Explanation. Stoometer
172:18 Right arrow. Explanation. Stoometer release oxygen and water vapor.
172:21 release oxygen and water vapor. 458.
172:24 458. The human heart has how many chambers?
172:28 The human heart has how many chambers? A 2 B 3 C 4 D 5. Check mark. Correct
172:34 A 2 B 3 C 4 D 5. Check mark. Correct answer. C four. Right arrow.
172:37 answer. C four. Right arrow. Explanation: Two atria and two
172:40 Explanation: Two atria and two ventricles.
172:42 ventricles. 459.
172:44 459. Excess water is removed from the body by
172:48 Excess water is removed from the body by A. Lungs. B. Kidneys. C. Liver. D.
172:52 A. Lungs. B. Kidneys. C. Liver. D. Heart.
172:54 Heart. Check mark. Correct answer. B. Kidneys.
172:57 Check mark. Correct answer. B. Kidneys. Right arrow. Explanation. Kidneys
173:00 Right arrow. Explanation. Kidneys maintain water balance.
173:03 maintain water balance. 460.
173:05 460. Carbon dioxide is removed by A kidneys
173:09 Carbon dioxide is removed by A kidneys only, B liver only, C lungs, D bones.
173:15 only, B liver only, C lungs, D bones. Check mark correct answer. C lungs.
173:18 Check mark correct answer. C lungs. Right arrow. Explanation. Core leaves
173:21 Right arrow. Explanation. Core leaves the body through exhalation.
173:24 the body through exhalation. 461.
173:27 461. Oxygen in blood is carried by A.
173:30 Oxygen in blood is carried by A. Platelets, B. Plasma, C. Hemoglobin D.
173:35 Platelets, B. Plasma, C. Hemoglobin D. Lymph.
173:36 Lymph. Check mark. Correct answer. C.
173:39 Check mark. Correct answer. C. Hemoglobin. Right arrow. Explanation.
173:42 Hemoglobin. Right arrow. Explanation. Hemoglobin binds oxygen molecules.
173:46 Hemoglobin binds oxygen molecules. 462.
173:49 462. Lymph transports mainly. A. Carbon
173:52 Lymph transports mainly. A. Carbon dioxide. B. Fat molecules. C. Oxygen. D.
173:57 dioxide. B. Fat molecules. C. Oxygen. D. Sugar.
173:59 Sugar. Check mark. Correct answer. B. Fat
174:02 Check mark. Correct answer. B. Fat molecules. Right arrow explanation.
174:05 molecules. Right arrow explanation. Lymph absorbs fats from intestines.
174:09 Lymph absorbs fats from intestines. 463.
174:11 463. Guard cells control. A. Blood flow. B.
174:15 Guard cells control. A. Blood flow. B. Nefron action. C. Stroter opening. D.
174:20 Nefron action. C. Stroter opening. D. Urine formation. Check mark. Correct
174:22 Urine formation. Check mark. Correct answer. C. Stroter opening. Right arrow.
174:26 answer. C. Stroter opening. Right arrow. Explanation. Guard cells regulate gas
174:29 Explanation. Guard cells regulate gas exchange.
174:31 exchange. 464
174:33 464 Exhaled air contains more. A oxygen B
174:38 Exhaled air contains more. A oxygen B glucose C carbon dioxide D proteins.
174:43 glucose C carbon dioxide D proteins. Check mark correct answer C carbon
174:46 Check mark correct answer C carbon dioxide. Right arrow explanation.
174:49 dioxide. Right arrow explanation. Respiration releases CO.
174:52 Respiration releases CO. 465.
174:55 465. Mitochondria are known as A brain of
174:58 Mitochondria are known as A brain of cell, B powerhouse of cell, C skeleton
175:02 cell, B powerhouse of cell, C skeleton of cell, D guard of cell. Check mark
175:07 of cell, D guard of cell. Check mark correct answer. B powerhouse of cell.
175:10 correct answer. B powerhouse of cell. Right arrow. Explanation. Mitochondria
175:13 Right arrow. Explanation. Mitochondria generate energy. ATP.
175:16 generate energy. ATP. 466.
175:19 466. URA is formed in the A. Heart, B.
175:23 URA is formed in the A. Heart, B. Kidneys, C liver, D. Stomach.
175:27 Kidneys, C liver, D. Stomach. Check mark. Correct answer. C. Liver.
175:30 Check mark. Correct answer. C. Liver. Right arrow. Explanation. The liver
175:33 Right arrow. Explanation. The liver converts ammonia into ura.
175:36 converts ammonia into ura. 467.
175:39 467. Blood vessels with valves are A.
175:42 Blood vessels with valves are A. Arteries, B. Wes, Capillaries,
175:46 Arteries, B. Wes, Capillaries, D bronchi.
175:48 D bronchi. Check mark. Correct answer. B. Waines.
175:52 Check mark. Correct answer. B. Waines. Right arrow explanation. Wells prevent
175:55 Right arrow explanation. Wells prevent backflow of blood.
175:57 backflow of blood. 468.
176:00 468. Bile emulsifies.
176:02 Bile emulsifies. A. Proteins. B. Fats. C. Sugars. D.
176:06 A. Proteins. B. Fats. C. Sugars. D. Vitamins.
176:08 Vitamins. Check mark. Correct answer. B. Fats.
176:11 Check mark. Correct answer. B. Fats. Right arrow. Explanation. Bile breaks
176:14 Right arrow. Explanation. Bile breaks fats into tiny droplets.
176:18 fats into tiny droplets. 469.
176:20 469. The longest part of elementary canal is
176:24 The longest part of elementary canal is A esophagus, B small intestine, C large
176:29 A esophagus, B small intestine, C large intestine, D stomach.
176:32 intestine, D stomach. Check mark correct answer B small
176:35 Check mark correct answer B small intestine. Right arrow explanation.
176:38 intestine. Right arrow explanation. Small intestine is about 6 m long.
176:43 Small intestine is about 6 m long. 470.
176:45 470. An aerobic respiration happens in
176:48 An aerobic respiration happens in absence of A carbon dioxide, B oxygen, C
176:53 absence of A carbon dioxide, B oxygen, C water, D sunlight.
176:56 water, D sunlight. Check mark correct answer. B oxygen.
177:00 Check mark correct answer. B oxygen. Right arrow. Explanation. No oxygen is
177:03 Right arrow. Explanation. No oxygen is used in anorobic respiration.
177:07 used in anorobic respiration. 471.
177:09 471. The term double circulation means A two
177:13 The term double circulation means A two hearts, B two circuites of blood flow, C
177:18 hearts, B two circuites of blood flow, C double breathing, D double digestion.
177:22 double breathing, D double digestion. Check mark correct answer. B two
177:24 Check mark correct answer. B two circuites of blood flow. Right arrow
177:27 circuites of blood flow. Right arrow explanation systemic and pulmonary
177:30 explanation systemic and pulmonary circulation.
177:32 circulation. 472.
177:35 472. Alcohol is produced during Aerobic
177:38 Alcohol is produced during Aerobic respiration, B an aerobic respiration, C
177:43 respiration, B an aerobic respiration, C excretion, Digestion.
177:46 excretion, Digestion. Check mark correct answer. B. An aerobic
177:50 Check mark correct answer. B. An aerobic respiration. Right arrow explanation.
177:52 respiration. Right arrow explanation. Yeast fermentss sugars to alcohol.
177:56 Yeast fermentss sugars to alcohol. 473.
177:59 473. The energy currency of cell is a r n a b
178:04 The energy currency of cell is a r n a b d n a cp
178:08 d n a cp d ura
178:10 d ura check mark correct answer cp right arrow
178:14 check mark correct answer cp right arrow explanation ATP stores usable energy
178:19 explanation ATP stores usable energy 474
178:22 474 blood flows fastest in a veins b c
178:26 blood flows fastest in a veins b c capillaries c arteries D. Bronchi.
178:31 capillaries c arteries D. Bronchi. Check mark. Correct answer. C. Arteries.
178:34 Check mark. Correct answer. C. Arteries. Right arrow. Explanation. High pressure
178:37 Right arrow. Explanation. High pressure propels blood in arteries.
178:40 propels blood in arteries. 475.
178:43 475. Lungs get fresh air through. A. Food
178:46 Lungs get fresh air through. A. Food pipe. B. Trachea. C. Bronchules. D.
178:50 pipe. B. Trachea. C. Bronchules. D. Kidney tubules.
178:53 Kidney tubules. Check mark. Correct answer. B. Trickier.
178:56 Check mark. Correct answer. B. Trickier. Right arrow. Explanation: Trachea leads
178:59 Right arrow. Explanation: Trachea leads air to lungs.
179:02 air to lungs. 476.
179:04 476. The green pigment in plants is A.
179:08 The green pigment in plants is A. Hemoglobin. B. Chlorophyll. C. Keratin.
179:12 Hemoglobin. B. Chlorophyll. C. Keratin. D. Xanthophil.
179:14 D. Xanthophil. Check mark. Correct answer. B.
179:17 Check mark. Correct answer. B. Chlorophyll. Right arrow. Explanation.
179:20 Chlorophyll. Right arrow. Explanation. Chlorophyll captures sunlight.
179:23 Chlorophyll captures sunlight. 477.
179:26 477. Photosynthesis results in production of
179:29 Photosynthesis results in production of A oxygen and sugar, B only ura, C water
179:35 A oxygen and sugar, B only ura, C water only, D carbon dioxide.
179:38 only, D carbon dioxide. Check mark correct answer. A oxygen and
179:42 Check mark correct answer. A oxygen and sugar right arrow. Explanation
179:44 sugar right arrow. Explanation photosynthesis makes glucoseno.
179:48 photosynthesis makes glucoseno. 478.
179:51 478. Excreary product in humans is A oxygen,
179:55 Excreary product in humans is A oxygen, B glucose, C ura, D starch.
180:00 B glucose, C ura, D starch. Check mark correct answer. C ura right
180:04 Check mark correct answer. C ura right arrow explanation. URA is excreted via
180:08 arrow explanation. URA is excreted via urine.
180:09 urine. 479.
180:12 479. Carbon dioxide dissolves in A. Lymph
180:16 Carbon dioxide dissolves in A. Lymph only, B. Plasma C. Platelets D. Hair
180:21 only, B. Plasma C. Platelets D. Hair cells.
180:22 cells. Check mark. Correct answer. B. Plasma.
180:25 Check mark. Correct answer. B. Plasma. Right arrow. Explanation. Co is carried
180:28 Right arrow. Explanation. Co is carried in plasma.
180:31 in plasma. 480.
180:33 480. Food moves in the gut due to A.
180:36 Food moves in the gut due to A. Sweating, B. Exhalation, C. Paristalis,
180:40 Sweating, B. Exhalation, C. Paristalis, D osmosis.
180:43 D osmosis. Check mark. Correct answer. C.
180:45 Check mark. Correct answer. C. Paristalis. Right arrow explanation.
180:48 Paristalis. Right arrow explanation. Muscles push food forward.
180:52 Muscles push food forward. 481.
180:54 481. Plants lose water by A. Inhalation, B.
180:58 Plants lose water by A. Inhalation, B. Perspiration. C. Transpiration. D.
181:02 Perspiration. C. Transpiration. D. Fermentation. Check mark. Correct
181:04 Fermentation. Check mark. Correct answer. C. Transpiration. Right arrow.
181:07 answer. C. Transpiration. Right arrow. Explanation. Water evaporates from
181:10 Explanation. Water evaporates from leaves.
181:12 leaves. 482.
181:14 482. The upper chambers of heart are called A
181:18 The upper chambers of heart are called A ventricles, B bronchi, C atria, D
181:22 ventricles, B bronchi, C atria, D nephrons.
181:24 nephrons. Check mark correct answer. C atria right
181:28 Check mark correct answer. C atria right arrow explanation. Atria receive blood
181:31 arrow explanation. Atria receive blood into heart.
181:33 into heart. 483
181:36 483 fat digestion requires A. AMA, B.
181:40 fat digestion requires A. AMA, B. Pepsin, C. Lipase D. Trison.
181:44 Pepsin, C. Lipase D. Trison. Check mark. Correct answer. C. Lipase.
181:48 Check mark. Correct answer. C. Lipase. Right arrow. Explanation. Lipase breaks
181:51 Right arrow. Explanation. Lipase breaks down fats.
181:53 down fats. 484.
181:56 484. Air enters lungs due to a pressure
181:59 Air enters lungs due to a pressure decrease, Bone movement, C water
182:03 decrease, Bone movement, C water pressure, D light energy.
182:07 pressure, D light energy. Check mark. Correct answer. A pressure
182:10 Check mark. Correct answer. A pressure decrease. Right arrow explanation.
182:12 decrease. Right arrow explanation. Diaphragm lowers air pressure.
182:16 Diaphragm lowers air pressure. 485.
182:19 485. Blood carries A only oxygen. B only
182:23 Blood carries A only oxygen. B only waste. C nutrients gases. Wastes. D only
182:29 waste. C nutrients gases. Wastes. D only DNA.
182:30 DNA. Check mark. Correct answer. C. Nutrients
182:34 Check mark. Correct answer. C. Nutrients gases. Wastes. Right arrow. Explanation.
182:38 gases. Wastes. Right arrow. Explanation. Blood transports many substances.
182:42 Blood transports many substances. 486.
182:45 486. Photosynthesis is mainly in A roots, B
182:49 Photosynthesis is mainly in A roots, B stem bark, C leaves, D flowers.
182:54 stem bark, C leaves, D flowers. Check mark. Correct answer. C. Leaves.
182:58 Check mark. Correct answer. C. Leaves. Right arrow. Explanation. Leaves have
183:00 Right arrow. Explanation. Leaves have chlorophyll for photosynthesis.
183:04 chlorophyll for photosynthesis. 487.
183:07 487. Heart valves prevent A. Air mixing, B
183:11 Heart valves prevent A. Air mixing, B digestion, C blood backflow, D oxygen
183:15 digestion, C blood backflow, D oxygen loss.
183:17 loss. Check mark correct answer. C blood
183:20 Check mark correct answer. C blood backflow. Right arrow explanation. Wells
183:23 backflow. Right arrow explanation. Wells ensure oneway flow.
183:26 ensure oneway flow. 488.
183:28 488. The functional unit of kidney is A
183:32 The functional unit of kidney is A neuron, B nephron, C bronchus, D atrium.
183:38 neuron, B nephron, C bronchus, D atrium. Check mark correct answer. B nephron
183:41 Check mark correct answer. B nephron right arrow explanation. Nephrons filter
183:44 right arrow explanation. Nephrons filter blood and form urine.
183:47 blood and form urine. 489.
183:49 489. Energy in plants is stored as a protein
183:53 Energy in plants is stored as a protein b starch c fat only d ura. Check mark
184:00 b starch c fat only d ura. Check mark correct answer b starch right arrow
184:03 correct answer b starch right arrow explanation plants store glucose as
184:06 explanation plants store glucose as starch.
184:08 starch. 490
184:10 490 white blood cells. A carry oxygen. B
184:14 white blood cells. A carry oxygen. B digest food. C fight infections. D store
184:19 digest food. C fight infections. D store fat.
184:20 fat. Check mark. Correct answer. C fight
184:23 Check mark. Correct answer. C fight infections. Right arrow. Explanation.
184:26 infections. Right arrow. Explanation. WBC's defend against germs.
184:30 WBC's defend against germs. 491.
184:33 491. Carbon dioxide leaves body through. A.
184:37 Carbon dioxide leaves body through. A. Skin only. B kidneys only. C lungs. D.
184:42 Skin only. B kidneys only. C lungs. D. Heart. Check mark. Correct answer. C.
184:46 Heart. Check mark. Correct answer. C. Lungs. Right arrow. Explanation.
184:48 Lungs. Right arrow. Explanation. Exhalation removes. CO.
184:52 Exhalation removes. CO. 492.
184:54 492. Pancreas is both a muscle and nerve
184:58 Pancreas is both a muscle and nerve tissue. B. Exocrine and endocrine gland.
185:01 tissue. B. Exocrine and endocrine gland. C. Bone and blood. D. Brain and heart.
185:06 C. Bone and blood. D. Brain and heart. Check mark. Correct answer. B. Exocrine
185:09 Check mark. Correct answer. B. Exocrine and endocrine gland. Right arrow.
185:11 and endocrine gland. Right arrow. Explanation. Pancreas makes hormones and
185:14 Explanation. Pancreas makes hormones and enzymes.
185:16 enzymes. 493.
185:19 493. Aorta carries blood to A. Kidneys only.
185:23 Aorta carries blood to A. Kidneys only. B. Lungs only. C. Whole body. D. Stomach
185:28 B. Lungs only. C. Whole body. D. Stomach only. Check mark. Correct answer. C.
185:32 only. Check mark. Correct answer. C. Whole body. Right arrow. Explanation.
185:35 Whole body. Right arrow. Explanation. AOT distributes oxygenated blood.
185:39 AOT distributes oxygenated blood. 494
185:42 494 Broni divide into A veins, B arteries, C
185:47 Broni divide into A veins, B arteries, C bronchioles, D atrium.
185:50 bronchioles, D atrium. Check mark correct answer. C bronchioles
185:54 Check mark correct answer. C bronchioles right arrow. Explanation. Bronchioles
185:56 right arrow. Explanation. Bronchioles carry air deeper into lungs.
186:00 carry air deeper into lungs. 495.
186:02 495. Plants use light energy for a excretion,
186:07 Plants use light energy for a excretion, b photosynthesis, c digestion, d
186:11 b photosynthesis, c digestion, d respiration only. Check mark correct
186:14 respiration only. Check mark correct answer b photosynthesis. Right arrow
186:18 answer b photosynthesis. Right arrow explanation. Sunlight fuels glucose
186:21 explanation. Sunlight fuels glucose production.
186:23 production. 496.
186:25 496. The diaphragm is a A bone, B muscle, C
186:30 The diaphragm is a A bone, B muscle, C nerve, D blood vessel. Check mark.
186:34 nerve, D blood vessel. Check mark. Correct answer. B muscle. Right arrow.
186:38 Correct answer. B muscle. Right arrow. Explanation. It controls breathing.
186:42 Explanation. It controls breathing. 497.
186:44 497. Food turns into liquid called A. Bolus,
186:48 Food turns into liquid called A. Bolus, B. Plasma, C. Kime, D. Nefron.
186:53 B. Plasma, C. Kime, D. Nefron. Check mark. Correct answer C. Kim right
186:57 Check mark. Correct answer C. Kim right arrow. Explanation. Kim forms in the
187:00 arrow. Explanation. Kim forms in the stomach.
187:01 stomach. 498.
187:04 498. Kidney stones are deposits of A.
187:07 Kidney stones are deposits of A. Protein, B. Calcium salts. C. Star
187:11 Protein, B. Calcium salts. C. Star starch, D vitamins.
187:14 starch, D vitamins. Check mark. Correct answer. B. Calcium
187:17 Check mark. Correct answer. B. Calcium salts. Right arrow. Explanation. Stones
187:20 salts. Right arrow. Explanation. Stones form from minerals in urine.
187:23 form from minerals in urine. 499
187:26 499 plants exchange gases through A. Willie,
187:30 plants exchange gases through A. Willie, B. Stoometer, C. Wes, D. Nerves. Check
187:35 B. Stoometer, C. Wes, D. Nerves. Check mark. Correct answer. B. Stoometer.
187:38 mark. Correct answer. B. Stoometer. Right arrow. Explanation. Stoometer.
187:41 Right arrow. Explanation. Stoometer. Allow gas movement.
187:44 Allow gas movement. 500. Bronchitis effects. A. Stomach. B.
187:49 500. Bronchitis effects. A. Stomach. B. Lungs. C. Kidneys. D. Liver.
187:53 Lungs. C. Kidneys. D. Liver. Check mark. Correct answer. B. Lungs.
187:56 Check mark. Correct answer. B. Lungs. Right arrow. Explanation. Bronchitis is
188:00 Right arrow. Explanation. Bronchitis is inflammation of airways.
188:03 inflammation of airways. 51.
188:05 51. The blood vessels which carry blood
188:07 The blood vessels which carry blood towards the heart are a arteries bes
188:12 towards the heart are a arteries bes capillaries. D. Lymph vessels.
188:16 capillaries. D. Lymph vessels. Check mark. Correct answer. B. Waines.
188:19 Check mark. Correct answer. B. Waines. Right arrow. Explanation. veins bring
188:22 Right arrow. Explanation. veins bring deoxxygenated blood back to the heart.
188:26 deoxxygenated blood back to the heart. 52.
188:28 52. The major nitrogenous waste excreted in
188:31 The major nitrogenous waste excreted in human urine is A. Ammonia, B. Uuric
188:35 human urine is A. Ammonia, B. Uuric acid, C. URA, D. Nitrogen gas.
188:40 acid, C. URA, D. Nitrogen gas. Check mark. Correct answer. C. URA.
188:44 Check mark. Correct answer. C. URA. Right arrow. Explanation. URA is the
188:46 Right arrow. Explanation. URA is the primary waste product of protein
188:49 primary waste product of protein metabolism.
188:51 metabolism. 53.
188:53 53. The wall of the stomach secretes A.
188:56 The wall of the stomach secretes A. Bile, B saliva, C gastric juice, D
189:01 Bile, B saliva, C gastric juice, D insulin.
189:03 insulin. Check mark. Correct answer. C gastric
189:06 Check mark. Correct answer. C gastric juice. Right arrow. Explanation. Gastric
189:09 juice. Right arrow. Explanation. Gastric juice contains HCL and pepsin for
189:12 juice contains HCL and pepsin for protein digestion.
189:15 protein digestion. 54.
189:16 54. The fluid part of blood is called A
189:20 The fluid part of blood is called A hemoglobin, B plasma, C platelets, D
189:25 hemoglobin, B plasma, C platelets, D WBC's.
189:27 WBC's. Check mark correct answer. B plasma.
189:30 Check mark correct answer. B plasma. Right arrow. Explanation. Plasma is the
189:33 Right arrow. Explanation. Plasma is the liquid part carrying dissolved
189:35 liquid part carrying dissolved substances.
189:38 substances. 55.
189:40 55. Lactic acid is formed during a aerobic
189:44 Lactic acid is formed during a aerobic respiration. B. An aerobic respiration
189:47 respiration. B. An aerobic respiration in muscles. C. Photosynthesis. D.
189:50 in muscles. C. Photosynthesis. D. Transpiration.
189:53 Transpiration. Check mark. Correct answer. B. An
189:55 Check mark. Correct answer. B. An aerobic respiration in muscles. Right
189:58 aerobic respiration in muscles. Right arrow. Explanation. Lack of oxygen in
190:01 arrow. Explanation. Lack of oxygen in muscles leads to lactic acid production.
190:05 muscles leads to lactic acid production. 56.
190:07 56. Stoometer are found in A roots, B
190:11 Stoometer are found in A roots, B leaves, C seeds, D fruits. Check mark
190:16 leaves, C seeds, D fruits. Check mark correct answer, B leaves. Right arrow
190:20 correct answer, B leaves. Right arrow explanation. Stoometer are small
190:22 explanation. Stoometer are small openings for gas exchange in leaves.
190:26 openings for gas exchange in leaves. 57.
190:28 57. Which of these prevents backflow of
190:30 Which of these prevents backflow of blood in veins? A. Valves. B. Mucus. C.
190:35 blood in veins? A. Valves. B. Mucus. C. R B C's D capillaries
190:40 R B C's D capillaries check mark correct answer A valves right
190:43 check mark correct answer A valves right arrow explanation valves ensure oneway
190:47 arrow explanation valves ensure oneway flow in veins
190:49 flow in veins 58
190:51 58 the function of willie is to A filter
190:55 the function of willie is to A filter waste B absorb nutrients C form blood
190:59 waste B absorb nutrients C form blood cells D produce enzymes
191:03 cells D produce enzymes check mark correct answer B. Absorb
191:06 check mark correct answer B. Absorb nutrients. Right arrow. Explanation.
191:09 nutrients. Right arrow. Explanation. Willy increase surface area for
191:11 Willy increase surface area for absorption in the intestine.
191:14 absorption in the intestine. 59.
191:16 59. Glucose is stored in plants as A.
191:20 Glucose is stored in plants as A. Cellulose. B. Star starch. C. Protein.
191:24 Cellulose. B. Star starch. C. Protein. D. DNA.
191:26 D. DNA. Check mark. Correct answer. B. Star
191:29 Check mark. Correct answer. B. Star starch. Right arrow. Explanation. Plants
191:32 starch. Right arrow. Explanation. Plants store excess glucose as starch.
191:36 store excess glucose as starch. 510.
191:37 510. Which part of the brain controls
191:40 Which part of the brain controls involuntary actions?
191:42 involuntary actions? A. Cerebrum. B. Cerebellum. C. Modella.
191:46 A. Cerebrum. B. Cerebellum. C. Modella. D. Corpus colosum.
191:49 D. Corpus colosum. Check mark. Correct answer. C. Modela.
191:52 Check mark. Correct answer. C. Modela. Right arrow. Explanation. Modela
191:55 Right arrow. Explanation. Modela controls breathing. Heartbeat. ETC.
191:59 controls breathing. Heartbeat. ETC. 511.
192:02 511. The kidneys are located in which cavity?
192:05 The kidneys are located in which cavity? A. Thoracic cavity. B. Abdominal cavity.
192:09 A. Thoracic cavity. B. Abdominal cavity. C. Cranial cavity. D. Pelvic cavity.
192:14 C. Cranial cavity. D. Pelvic cavity. Check mark. Correct answer. B. Abdominal
192:17 Check mark. Correct answer. B. Abdominal cavity. Right arrow. Explanation.
192:20 cavity. Right arrow. Explanation. Kidneys lie in the abdomen on either
192:22 Kidneys lie in the abdomen on either side of the spine.
192:25 side of the spine. 512.
192:27 512. Lipase digests A. Proteins, B fats, C
192:32 Lipase digests A. Proteins, B fats, C carbohydrates, D minerals.
192:36 carbohydrates, D minerals. Check mark correct answer. B fats. Right
192:39 Check mark correct answer. B fats. Right arrow. Explanation. Lipase breaks fats
192:43 arrow. Explanation. Lipase breaks fats into fatty acids and glycerol.
192:46 into fatty acids and glycerol. 513.
192:48 513. The opening and closing of stoometer are
192:51 The opening and closing of stoometer are regulated by A. Xylm, B. Guard cells. C.
192:57 regulated by A. Xylm, B. Guard cells. C. Flim. D. Cortex cells. Check mark.
193:00 Flim. D. Cortex cells. Check mark. Correct answer. B. Guard cells. Right
193:04 Correct answer. B. Guard cells. Right arrow. Explanation. Guard cells swell or
193:07 arrow. Explanation. Guard cells swell or shrink to control stomatital opening.
193:10 shrink to control stomatital opening. 514.
193:12 514. URA is transported from liver to kidneys
193:16 URA is transported from liver to kidneys through a lymph, b blood, c neurons, d
193:21 through a lymph, b blood, c neurons, d bronchi.
193:23 bronchi. Check mark. Correct answer B. Blood
193:26 Check mark. Correct answer B. Blood right arrow. Explanation. URA dissolves
193:29 right arrow. Explanation. URA dissolves in blood plasma and is carried to
193:31 in blood plasma and is carried to kidneys.
193:33 kidneys. 515.
193:35 515. The process of removing metabolic waste
193:38 The process of removing metabolic waste is called A ingestion, B excretion, C
193:43 is called A ingestion, B excretion, C digestion, D respiration.
193:47 digestion, D respiration. Check mark correct answer, B excretion.
193:50 Check mark correct answer, B excretion. Right arrow explanation. Excretion
193:53 Right arrow explanation. Excretion eliminates wastes like ura, CO and
193:56 eliminates wastes like ura, CO and salts.
193:58 salts. 516.
194:01 516. Which part of the digestive system is
194:03 Which part of the digestive system is involved in water absorption?
194:06 involved in water absorption? A. Mouth. B. Small intestine. C. Large
194:10 A. Mouth. B. Small intestine. C. Large intestine. D. Eophagus.
194:14 intestine. D. Eophagus. Check mark. Correct answer. C. Large
194:17 Check mark. Correct answer. C. Large intestine. Right arrow. Explanation.
194:20 intestine. Right arrow. Explanation. Large intestine absorbs water from
194:22 Large intestine absorbs water from undigested food.
194:25 undigested food. 517.
194:27 517. The pigment that gives red color to
194:30 The pigment that gives red color to blood is A. Chlorophyll. B. Hemoglobin.
194:34 blood is A. Chlorophyll. B. Hemoglobin. C. Carotene. D. Xanthophil.
194:38 C. Carotene. D. Xanthophil. Check mark. Correct answer. B.
194:40 Check mark. Correct answer. B. Hemoglobin. Right arrow. Explanation.
194:43 Hemoglobin. Right arrow. Explanation. Hemoglobin carries oxygen and gives
194:46 Hemoglobin carries oxygen and gives blood its color.
194:48 blood its color. 518.
194:50 518. An aerobic respiration in yeast produces
194:54 An aerobic respiration in yeast produces A. Lactic acid, B. Ethanol and CO, C
194:59 A. Lactic acid, B. Ethanol and CO, C oxygen, D protein.
195:02 oxygen, D protein. Check mark. Correct answer. B. Ethanol
195:05 Check mark. Correct answer. B. Ethanol and CO. Right arrow. Explanation. Yeast
195:09 and CO. Right arrow. Explanation. Yeast fermentss sugar into alcohol and carbon
195:12 fermentss sugar into alcohol and carbon dioxide.
195:14 dioxide. 519.
195:16 519. Plants primarily lose water through A
195:20 Plants primarily lose water through A photosynthesis, B transpiration, C
195:24 photosynthesis, B transpiration, C respiration, D germination.
195:27 respiration, D germination. Check mark correct answer, B
195:30 Check mark correct answer, B transpiration. Right arrow explanation.
195:33 transpiration. Right arrow explanation. Water evaporates from stoometer during
195:36 Water evaporates from stoometer during transpiration.
195:38 transpiration. 520.
195:40 520. The valve between left atrium and left
195:43 The valve between left atrium and left ventricle is called A tricuspid valve,
195:47 ventricle is called A tricuspid valve, Bicasper valve, C pulmonary valve, D
195:51 Bicasper valve, C pulmonary valve, D aortic valve. Check mark correct answer.
195:55 aortic valve. Check mark correct answer. Bicasper valve. Right arrow explanation.
195:59 Bicasper valve. Right arrow explanation. Also called the mital valve.
196:03 Also called the mital valve. 521.
196:05 521. Plasma mainly contains a gas only, B
196:10 Plasma mainly contains a gas only, B blood cells only, C water and dissolved
196:14 blood cells only, C water and dissolved substances, D nerve signals.
196:18 substances, D nerve signals. Check mark correct answer. C water and
196:21 Check mark correct answer. C water and dissolved substances. Right arrow
196:24 dissolved substances. Right arrow explanation. Plasma is the liquid part
196:26 explanation. Plasma is the liquid part of blood.
196:28 of blood. 522.
196:31 522. Bronchi further divide into A willie, B
196:35 Bronchi further divide into A willie, B nephrons, C bronchioles, D atriums.
196:40 nephrons, C bronchioles, D atriums. Check mark correct answer C bronchioles
196:44 Check mark correct answer C bronchioles right arrow. Explanation bronchioles end
196:47 right arrow. Explanation bronchioles end in alvolifer gas exchange.
196:51 in alvolifer gas exchange. 523
196:53 523 bile is stored in the A. Liver, B.
196:57 bile is stored in the A. Liver, B. Pancreas, C. G bladder, D. Kidneys.
197:02 Pancreas, C. G bladder, D. Kidneys. Check mark. Correct answer. C. Gall
197:05 Check mark. Correct answer. C. Gall bladder. Right arrow. Explanation.
197:08 bladder. Right arrow. Explanation. Gallbladder stores and releases bile.
197:12 Gallbladder stores and releases bile. 524.
197:14 524. The pigment essential for photosynthesis
197:17 The pigment essential for photosynthesis is A. Chlorophyll, B. Hemoglobin, C
197:22 is A. Chlorophyll, B. Hemoglobin, C melanin, D rodopsin.
197:25 melanin, D rodopsin. Check mark. Correct answer. A.
197:27 Check mark. Correct answer. A. Chlorophyll. Right arrow. Explanation.
197:30 Chlorophyll. Right arrow. Explanation. Chlorophyll traps sunlight for
197:32 Chlorophyll traps sunlight for photosynthesis.
197:34 photosynthesis. 525.
197:37 525. The uritas carry urine from A. Heart to
197:41 The uritas carry urine from A. Heart to liver. B. Kidney to bladder. C. Lungs to
197:45 liver. B. Kidney to bladder. C. Lungs to heart. D. Bladder to outside.
197:49 heart. D. Bladder to outside. Check mark. Correct answer. B. Kidney to
197:52 Check mark. Correct answer. B. Kidney to bladder. Right arrow. Explanation:
197:55 bladder. Right arrow. Explanation: Ureers are tubes transporting urine.
197:59 Ureers are tubes transporting urine. 526
198:02 526 The primary function of red blood cells
198:04 The primary function of red blood cells is to A produce hormones, B. Carry
198:09 is to A produce hormones, B. Carry oxygen, C fight infections, D form bile.
198:14 oxygen, C fight infections, D form bile. Check mark correct answer. B carry
198:17 Check mark correct answer. B carry oxygen. Right arrow explanation. RBC's
198:21 oxygen. Right arrow explanation. RBC's transport oxygen using hemoglobin.
198:25 transport oxygen using hemoglobin. 527.
198:28 527. During exhalation, the diaphragm
198:31 During exhalation, the diaphragm A contracts, B relaxes, C divides into
198:36 A contracts, B relaxes, C divides into two parts. D breaks down. Food. Check
198:39 two parts. D breaks down. Food. Check mark. Correct answer. B relaxes. Right
198:43 mark. Correct answer. B relaxes. Right arrow. Explanation. Diaphragm relaxes to
198:46 arrow. Explanation. Diaphragm relaxes to push air out.
198:48 push air out. 528.
198:51 528. The process of taking food into the body
198:54 The process of taking food into the body is called A ingestion, B igestion, C
198:59 is called A ingestion, B igestion, C digestion, D excretion.
199:02 digestion, D excretion. Check mark correct answer. A ingestion.
199:05 Check mark correct answer. A ingestion. Right arrow. Explanation. Ingestion
199:08 Right arrow. Explanation. Ingestion means eating or swallowing.
199:11 means eating or swallowing. 529.
199:14 529. The basic unit of lung where gas
199:16 The basic unit of lung where gas exchange occurs is A trachea, B
199:20 exchange occurs is A trachea, B alvololis, C bronchus, D kidney tubule.
199:26 alvololis, C bronchus, D kidney tubule. Check mark correct answer B alvolus.
199:29 Check mark correct answer B alvolus. Right arrow explanation. Alvoli have
199:32 Right arrow explanation. Alvoli have thin walls for gas diffusion.
199:35 thin walls for gas diffusion. 530.
199:37 530. Proteins are digested into a sugars, b
199:42 Proteins are digested into a sugars, b fatty acids, c amino acids, d water
199:46 fatty acids, c amino acids, d water only. Check mark correct answer. C amino
199:51 only. Check mark correct answer. C amino acids. Right arrow. Explanation.
199:53 acids. Right arrow. Explanation. Proteins break down into amino acids.
199:58 Proteins break down into amino acids. 531.
200:00 531. Mucus in the respiratory tract helps to
200:04 Mucus in the respiratory tract helps to A digest food, B trap dust particles, C
200:09 A digest food, B trap dust particles, C break down fats, D carry oxygen.
200:13 break down fats, D carry oxygen. Check mark correct answer. B trap dust
200:17 Check mark correct answer. B trap dust particles. Right arrow explanation.
200:20 particles. Right arrow explanation. Mucus keeps airways clean.
200:23 Mucus keeps airways clean. 532.
200:26 532. Nefrons filter. A air B. Blood, C. Bile,
200:31 Nefrons filter. A air B. Blood, C. Bile, D. Lymph.
200:33 D. Lymph. Check mark. Correct answer. B. Blood.
200:36 Check mark. Correct answer. B. Blood. Right arrow. Explanation. Nephrons
200:39 Right arrow. Explanation. Nephrons remove wastes from blood.
200:42 remove wastes from blood. 533.
200:44 533. An aerobic respiration does not use a
200:48 An aerobic respiration does not use a oxygen b carbon dioxide c sugar d
200:53 oxygen b carbon dioxide c sugar d enzymes.
200:55 enzymes. Check mark. Correct answer. A oxygen.
200:58 Check mark. Correct answer. A oxygen. Write arrow explanation. Anerobic means
201:02 Write arrow explanation. Anerobic means without oxygen.
201:04 without oxygen. 534.
201:07 534. Water absorbed by roots moves through. A
201:11 Water absorbed by roots moves through. A flow. B. Xylm. C. Strometer. D. Cuticle.
201:16 flow. B. Xylm. C. Strometer. D. Cuticle. Check mark. Correct answer. B. Xylm.
201:19 Check mark. Correct answer. B. Xylm. Right arrow. Explanation. Xylm
201:22 Right arrow. Explanation. Xylm transports water in plants.
201:26 transports water in plants. 535.
201:28 535. Lymph is similar to A blood plasma, B
201:32 Lymph is similar to A blood plasma, B bone marrow, C hair cells, D sweat.
201:37 bone marrow, C hair cells, D sweat. Check mark correct answer. A blood
201:40 Check mark correct answer. A blood plasma. Right arrow. Explanation.
201:43 plasma. Right arrow. Explanation. Lymphus plasma like but without RBCs.
201:48 Lymphus plasma like but without RBCs. 536.
201:50 536. Gas exchange occurs by A. Active
201:54 Gas exchange occurs by A. Active transport, B. Osmosis, C. Diffusion, D.
201:59 transport, B. Osmosis, C. Diffusion, D. Digestion.
202:00 Digestion. Check mark. Correct answer. C.
202:03 Check mark. Correct answer. C. Diffusion. Right arrow. Explanation.
202:06 Diffusion. Right arrow. Explanation. Gases move from high to low
202:08 Gases move from high to low concentration.
202:10 concentration. 537.
202:13 537. Excretion in plants occurs mainly
202:15 Excretion in plants occurs mainly through a stoometer and roots, b willie,
202:20 through a stoometer and roots, b willie, c kidneys, d alvoli.
202:24 c kidneys, d alvoli. Check mark. Correct answer. A. Stormeter
202:27 Check mark. Correct answer. A. Stormeter and roots. Right arrow. Explanation.
202:30 and roots. Right arrow. Explanation. Plants excrete gases and wastes this
202:32 Plants excrete gases and wastes this way.
202:34 way. 538.
202:37 538. The fluid that carries hormones is A.
202:40 The fluid that carries hormones is A. Bile. B. Plasma. C. Sweat. D. Neurons.
202:46 Bile. B. Plasma. C. Sweat. D. Neurons. Check mark. Correct answer. B. Plasma.
202:49 Check mark. Correct answer. B. Plasma. Right arrow. Explanation. Plasma
202:52 Right arrow. Explanation. Plasma transports hormones.
202:55 transports hormones. 539.
202:57 539. URA is produced during metabolism of A.
203:02 URA is produced during metabolism of A. Carbohydrates, B. Proteins, C fats, D
203:06 Carbohydrates, B. Proteins, C fats, D minerals.
203:08 minerals. Check mark. Correct answer. B. Proteins.
203:12 Check mark. Correct answer. B. Proteins. Right arrow. Explanation. URA comes from
203:15 Right arrow. Explanation. URA comes from breakdown of amino acids.
203:18 breakdown of amino acids. 540.
203:20 540. Breathing rate increases during A sleep,
203:24 Breathing rate increases during A sleep, B exercise, C sitting quietly, D eating.
203:30 B exercise, C sitting quietly, D eating. Check mark correct answer. B exercise.
203:33 Check mark correct answer. B exercise. Right arrow. Explanation. Muscles need
203:36 Right arrow. Explanation. Muscles need more oxygen during exercise.
203:40 more oxygen during exercise. 541.
203:42 541. The liquid food in stomach is called A.
203:46 The liquid food in stomach is called A. Plasma, B. Kim, C. Bile D lymph
203:52 Plasma, B. Kim, C. Bile D lymph check mark correct answer B kim right
203:55 check mark correct answer B kim right arrow explanation Kim is semi-liquid
203:58 arrow explanation Kim is semi-liquid food in stomach
204:00 food in stomach 542
204:03 542 sweat helps in A digestion B temperature
204:07 sweat helps in A digestion B temperature regulation C blood circulation D gas
204:12 regulation C blood circulation D gas exchange
204:14 exchange check mark correct answer B temperature
204:17 check mark correct answer B temperature regulation right arrow Explanation:
204:20 regulation right arrow Explanation: Sweat cools the body.
204:22 Sweat cools the body. 543.
204:25 543. Urinary bladder stores. A. Blood. B.
204:29 Urinary bladder stores. A. Blood. B. Oxygen. C. Urine. D. Enzymes.
204:34 Oxygen. C. Urine. D. Enzymes. Check mark. Correct answer. C. Urine.
204:37 Check mark. Correct answer. C. Urine. Right arrow. Explanation. Bladder holds
204:40 Right arrow. Explanation. Bladder holds urine before excretion.
204:43 urine before excretion. 544.
204:46 544. Alvoli walls are A thick and hard, B
204:50 Alvoli walls are A thick and hard, B thin and moist, C bone like, D covered
204:54 thin and moist, C bone like, D covered in muscle.
204:56 in muscle. Check mark correct answer. B thin and
204:59 Check mark correct answer. B thin and moist. Right arrow explanation helps
205:01 moist. Right arrow explanation helps gases diffuse easily.
205:05 gases diffuse easily. 545.
205:07 545. Bile acts on a sugar, b proteins, c
205:12 Bile acts on a sugar, b proteins, c fats, d vitamins.
205:15 fats, d vitamins. Check mark. Correct answer. C. Fats.
205:18 Check mark. Correct answer. C. Fats. Right arrow. Explanation. Bile breaks
205:21 Right arrow. Explanation. Bile breaks fats into droplets.
205:24 fats into droplets. 546.
205:27 546. Hemoglobin binds with A. Carbon dioxide
205:31 Hemoglobin binds with A. Carbon dioxide only, B. Oxygen, C water only, D ura
205:36 only, B. Oxygen, C water only, D ura only.
205:38 only. Check mark. Correct answer. B. Oxygen.
205:41 Check mark. Correct answer. B. Oxygen. Right arrow. Explanation. Hemoglobin
205:44 Right arrow. Explanation. Hemoglobin transports oxygen in blood.
205:48 transports oxygen in blood. 547.
205:50 547. The lungs are covered by A plural, B
205:54 The lungs are covered by A plural, B cuticle, C cartilage, D bone. Check
205:59 cuticle, C cartilage, D bone. Check mark. Correct answer. A plural. Right
206:02 mark. Correct answer. A plural. Right arrow. Explanation. Plural is a
206:04 arrow. Explanation. Plural is a protective membrane.
206:07 protective membrane. 548.
206:10 548. Glucose is converted to energy in A
206:13 Glucose is converted to energy in A ribosomes, B mitochondria, C loss, D
206:19 ribosomes, B mitochondria, C loss, D nucleus.
206:21 nucleus. Check mark correct answer. B
206:23 Check mark correct answer. B mitochondria. Right arrow. Explanation.
206:26 mitochondria. Right arrow. Explanation. Mitochondria produce ATP?
206:30 Mitochondria produce ATP? 549.
206:33 549. Which vessel carries oxygenated blood
206:35 Which vessel carries oxygenated blood from lungs? A. Pulmonary artery. B.
206:39 from lungs? A. Pulmonary artery. B. Pulmonary vein. C. Renal artery. D.
206:43 Pulmonary vein. C. Renal artery. D. Hpatic vein.
206:46 Hpatic vein. Check mark. Correct answer. B. Pulmonary
206:49 Check mark. Correct answer. B. Pulmonary vein. Right arrow. Explanation.
206:51 vein. Right arrow. Explanation. Pulmonary vein brings oxygenrich blood
206:54 Pulmonary vein brings oxygenrich blood to heart.
206:56 to heart. 550.
206:58 550. The process of removing undigested food
207:01 The process of removing undigested food is a ingestion, b digestion, c igestion,
207:07 is a ingestion, b digestion, c igestion, d excretion.
207:09 d excretion. Check mark. Correct answer. C.
207:12 Check mark. Correct answer. C. Eigestion. Right arrow. Explanation.
207:14 Eigestion. Right arrow. Explanation. Eigestion expels undigested remains.
207:19 Eigestion expels undigested remains. 551.
207:21 551. The main excretory organ in humans is A.
207:25 The main excretory organ in humans is A. Lungs, B. Heart, C. Kidney, D skin.
207:31 Lungs, B. Heart, C. Kidney, D skin. Check mark correct answer. C kidney.
207:34 Check mark correct answer. C kidney. Right arrow. Explanation. Kidneys filter
207:37 Right arrow. Explanation. Kidneys filter blood and form urine.
207:40 blood and form urine. 552.
207:42 552. The pigment present in red blood cells
207:45 The pigment present in red blood cells is A. Chlorophyll. B. Melanin. C.
207:49 is A. Chlorophyll. B. Melanin. C. Hemoglobin. D. Xanthophil. Check mark.
207:53 Hemoglobin. D. Xanthophil. Check mark. Correct answer. C. Hemoglobin. Right
207:56 Correct answer. C. Hemoglobin. Right arrow. Explanation. Hemoglobin carries
207:59 arrow. Explanation. Hemoglobin carries oxygen.
208:01 oxygen. 553.
208:03 553. The human heart pumps blood into A
208:07 The human heart pumps blood into A veins, B arteries, C lymph, D
208:11 veins, B arteries, C lymph, D bronchules.
208:13 bronchules. Check mark correct answer. B arteries
208:16 Check mark correct answer. B arteries right arrow. Explanation. Arteries carry
208:19 right arrow. Explanation. Arteries carry blood away from the heart.
208:22 blood away from the heart. 554.
208:24 554. The first part of small intestine is
208:27 The first part of small intestine is called A. Colon B. iliam C. Dadinum D.
208:33 called A. Colon B. iliam C. Dadinum D. Rectum.
208:34 Rectum. Check mark. Correct answer. C.
208:37 Check mark. Correct answer. C. Douadinum. Right arrow. Explanation.
208:40 Douadinum. Right arrow. Explanation. Doadinum receives kim from stomach.
208:44 Doadinum receives kim from stomach. 555.
208:46 555. Which structure prevents food from
208:48 Which structure prevents food from entering windpipe? A. Diaphragm. B.
208:52 entering windpipe? A. Diaphragm. B. Trachea. C. Epiglotus. D. Bronus.
208:57 Trachea. C. Epiglotus. D. Bronus. Check mark. Correct answer C. Epiglotus
209:01 Check mark. Correct answer C. Epiglotus right arrow. Explanation. Epiglotus
209:04 right arrow. Explanation. Epiglotus covers windpipe during swallowing.
209:07 covers windpipe during swallowing. 556.
209:10 556. The fluid formed after blood clotting is
209:13 The fluid formed after blood clotting is A. Serum, B plasma, C lymph, D mucus.
209:20 A. Serum, B plasma, C lymph, D mucus. Check mark. Correct answer. A serum.
209:23 Check mark. Correct answer. A serum. Right arrow. Explanation. Serum is
209:26 Right arrow. Explanation. Serum is plasma without clotting factors.
209:30 plasma without clotting factors. 557.
209:32 557. The heart valve between right atrium and
209:35 The heart valve between right atrium and ventricle is A. Mitral valve. B.
209:39 ventricle is A. Mitral valve. B. Tricuspid valve. C. Aotic valve. D.
209:43 Tricuspid valve. C. Aotic valve. D. Pulmonary valve.
209:45 Pulmonary valve. Check mark. Correct answer. B.
209:48 Check mark. Correct answer. B. Triricusper valve. Right arrow.
209:50 Triricusper valve. Right arrow. Explanation. Triricusper valve prevents
209:53 Explanation. Triricusper valve prevents backflow.
209:55 backflow. 558.
209:57 558. What gas diffuses from blood into lungs
210:00 What gas diffuses from blood into lungs to be exhaled? A. Oxygen. B. Hydrogen.
210:05 to be exhaled? A. Oxygen. B. Hydrogen. C. Carbon dioxide. D. Nitrogen.
210:09 C. Carbon dioxide. D. Nitrogen. Check mark. Correct answer. C. Carbon
210:12 Check mark. Correct answer. C. Carbon dioxide. Right arrow. Explanation. Co is
210:16 dioxide. Right arrow. Explanation. Co is expelled during exhalation.
210:19 expelled during exhalation. 559.
210:22 559. The organ producing bile. A pancreas, B.
210:26 The organ producing bile. A pancreas, B. Liver, C. Lungs, D. Kidneys.
210:31 Liver, C. Lungs, D. Kidneys. Check mark. Correct answer. B. Liver.
210:34 Check mark. Correct answer. B. Liver. Right arrow. Explanation. Liver secretes
210:37 Right arrow. Explanation. Liver secretes bile for fat digestion.
210:40 bile for fat digestion. 560.
210:42 560. Digestion of starch begins in th A.
210:46 Digestion of starch begins in th A. Stomach. B. Mouth. C. Liver. D. Lungs.
210:51 Stomach. B. Mouth. C. Liver. D. Lungs. Check mark. Correct answer. B. Mouth
210:54 Check mark. Correct answer. B. Mouth right arrow. Explanation. Salivary
210:57 right arrow. Explanation. Salivary amalayise breaks down starch.
211:01 amalayise breaks down starch. 561.
211:03 561. Blood vessels connecting arteries and
211:06 Blood vessels connecting arteries and veins are A. Lymph vessels, B.
211:09 veins are A. Lymph vessels, B. Capillaries, C bronchi, D nerves.
211:14 Capillaries, C bronchi, D nerves. Check mark. Correct answer. B.
211:17 Check mark. Correct answer. B. Capillaries. Right arrow. Explanation.
211:19 Capillaries. Right arrow. Explanation. Capillaries allow exchange of
211:22 Capillaries allow exchange of substances.
211:24 substances. 562.
211:26 562. Kidneys filter waste from A. Air, B.
211:30 Kidneys filter waste from A. Air, B. Blood, C food, D muscles.
211:34 Blood, C food, D muscles. Check mark. Correct answer. B blood.
211:37 Check mark. Correct answer. B blood. Right arrow. Explanation. Kidneys purify
211:41 Right arrow. Explanation. Kidneys purify blood by removing waste.
211:44 blood by removing waste. 563.
211:46 563. Movement of food in the gut is called A
211:50 Movement of food in the gut is called A diffusion, B paristalysis, C filtration,
211:54 diffusion, B paristalysis, C filtration, D secretion.
211:57 D secretion. Check mark correct answer. B
211:59 Check mark correct answer. B paristalysis. Right arrow. Explanation.
212:02 paristalysis. Right arrow. Explanation. Muscles contract to push food along.
212:06 Muscles contract to push food along. 564.
212:09 564. Which organ absorbs digested food? A.
212:13 Which organ absorbs digested food? A. Stomach. B. Esophagus. C. Small
212:16 Stomach. B. Esophagus. C. Small intestine D. Rectum.
212:19 intestine D. Rectum. Check mark. Correct answer. C. Small
212:22 Check mark. Correct answer. C. Small intestine. Right arrow. Explanation.
212:25 intestine. Right arrow. Explanation. Willie in small intestine absorb
212:28 Willie in small intestine absorb nutrients.
212:30 nutrients. 565.
212:33 565. Alcohol is produced in yeast during A.
212:36 Alcohol is produced in yeast during A. Aerobic respiration. B. Anerobic
212:40 Aerobic respiration. B. Anerobic respiration. C. Photosynthesis. D.
212:43 respiration. C. Photosynthesis. D. Filtration.
212:45 Filtration. Check mark. Correct answer. B. An
212:48 Check mark. Correct answer. B. An aerobic respiration. Right arrow.
212:50 aerobic respiration. Right arrow. Explanation. Yeast fermentss sugars
212:53 Explanation. Yeast fermentss sugars without oxygen.
212:56 without oxygen. 566.
212:58 566. The fluid protecting brain and spinal
213:01 The fluid protecting brain and spinal cord is. A. Bile. B. Sinovial fluid. C.
213:06 cord is. A. Bile. B. Sinovial fluid. C. Cerebrros fluid. D. Plasma. Check mark.
213:10 Cerebrros fluid. D. Plasma. Check mark. Correct answer. C. Cerebrospinal fluid.
213:14 Correct answer. C. Cerebrospinal fluid. Right arrow explanation. CSF cushions
213:17 Right arrow explanation. CSF cushions brain and spinal cord.
213:20 brain and spinal cord. 567.
213:22 567. The largest gland in human body is A.
213:26 The largest gland in human body is A. Kidney, B. Liver, C. Lungs, D. Spleen.
213:32 Kidney, B. Liver, C. Lungs, D. Spleen. Check mark. Correct answer. B. Liver.
213:35 Check mark. Correct answer. B. Liver. Right arrow. Explanation. Liver has many
213:38 Right arrow. Explanation. Liver has many vital functions.
213:41 vital functions. 568.
213:43 568. URA is removed from blood by A heart, B
213:48 URA is removed from blood by A heart, B kidneys, C lungs, D brain.
213:52 kidneys, C lungs, D brain. Check mark correct answer. B kid
213:55 Check mark correct answer. B kid kidneys. Right arrow. Explanation.
213:57 kidneys. Right arrow. Explanation. Kidneys excrete ura into urine.
214:01 Kidneys excrete ura into urine. 569.
214:04 569. Plants lose water vapor through A.
214:07 Plants lose water vapor through A. Nefrons. B. Roots. C. Stormter D. Heart.
214:13 Nefrons. B. Roots. C. Stormter D. Heart. Check mark. Correct answer. C. Stoter.
214:16 Check mark. Correct answer. C. Stoter. Right arrow. Explanation. Stoometer
214:19 Right arrow. Explanation. Stoometer release water vapor during
214:21 release water vapor during transpiration.
214:24 transpiration. 570.
214:26 570. Oxygen diffuses into blood in A.
214:29 Oxygen diffuses into blood in A. Trachea. B. Bronchi. C. Alvoli. D.
214:34 Trachea. B. Bronchi. C. Alvoli. D. Liver. Check mark. Correct answer. C.
214:38 Liver. Check mark. Correct answer. C. Alvoli. Right arrow. Explanation:
214:40 Alvoli. Right arrow. Explanation: Alvoli, a tiny air sacks for gas
214:43 Alvoli, a tiny air sacks for gas exchange.
214:45 exchange. 571.
214:48 571. Pepsin works best in A. Alkaline medium,
214:52 Pepsin works best in A. Alkaline medium, B. Acidic medium, C neutral medium, D.
214:56 B. Acidic medium, C neutral medium, D. Air. Check mark. Correct answer. B.
215:00 Air. Check mark. Correct answer. B. Acidic medium. Right arrow. Explanation.
215:04 Acidic medium. Right arrow. Explanation. HCl creates acidic environment for
215:06 HCl creates acidic environment for pepsin.
215:08 pepsin. 572.
215:11 572. The two main types of respiration are A
215:15 The two main types of respiration are A photosynthesis and excretion, B
215:18 photosynthesis and excretion, B ingestion and ingestion, C arobic and
215:21 ingestion and ingestion, C arobic and anorobic, D filtration and diffusion.
215:25 anorobic, D filtration and diffusion. Check mark correct answer. C Araobic and
215:28 Check mark correct answer. C Araobic and anorobic right arrow explanation. One
215:32 anorobic right arrow explanation. One uses oxygen, the other doesn't.
215:36 uses oxygen, the other doesn't. 573
215:38 573 Alvoli walls are A thick, B thin, C
215:43 Alvoli walls are A thick, B thin, C cartilagynous, D bony.
215:46 cartilagynous, D bony. Check mark correct answer B thin right
215:49 Check mark correct answer B thin right arrow. Explanation thin walls allow gas
215:53 arrow. Explanation thin walls allow gas diffusion.
215:55 diffusion. 574.
215:58 574. The energy currency of the cell is A D N
216:02 The energy currency of the cell is A D N A B R N A C Ap D ura
216:09 A B R N A C Ap D ura check mark correct answer C AP Right
216:12 check mark correct answer C AP Right arrow explanation ATP stores and
216:16 arrow explanation ATP stores and releases energy
216:18 releases energy 575
216:21 575 The function of platelets is A oxygen
216:25 The function of platelets is A oxygen transport B immunity C. Blood clotting.
216:29 transport B immunity C. Blood clotting. D. Digestion.
216:31 D. Digestion. Check mark. Correct answer. C. Blood
216:34 Check mark. Correct answer. C. Blood clotting. Right arrow. Explanation.
216:37 clotting. Right arrow. Explanation. Platelets help stop bleeding.
216:40 Platelets help stop bleeding. 576.
216:43 576. The respiratory organ in fish is A.
216:47 The respiratory organ in fish is A. Lungs. B. Gills. C. Trachea. D. Nefrons.
216:53 Lungs. B. Gills. C. Trachea. D. Nefrons. Check mark. Correct answer. B. Gills.
216:56 Check mark. Correct answer. B. Gills. Right arrow. Explanation: Gills extract
216:59 Right arrow. Explanation: Gills extract oxygen from water.
217:02 oxygen from water. 577.
217:04 577. Which gas is exhaled during respiration?
217:08 Which gas is exhaled during respiration? A. Oxygen. B. Nitrogen. C. Carbon
217:12 A. Oxygen. B. Nitrogen. C. Carbon dioxide. D. Helium.
217:15 dioxide. D. Helium. Check mark. Correct answer. C. Carbon
217:18 Check mark. Correct answer. C. Carbon dioxide. Right arrow. Explanation. Co is
217:22 dioxide. Right arrow. Explanation. Co is expelled as waste gas.
217:25 expelled as waste gas. 578.
217:27 578. The skin removes A bile, B sweat, C
217:32 The skin removes A bile, B sweat, C oxygen, D hemoglobin.
217:36 oxygen, D hemoglobin. Check mark correct answer. B sweat.
217:38 Check mark correct answer. B sweat. Right arrow. Explanation. Skin excretes
217:42 Right arrow. Explanation. Skin excretes water and salts.
217:44 water and salts. 579.
217:47 579. The liver converts ammonia into a ura, b
217:52 The liver converts ammonia into a ura, b oxygen, c lymph, d protein.
217:56 oxygen, c lymph, d protein. Check mark. Correct answer. A ura. Right
218:00 Check mark. Correct answer. A ura. Right arrow. Explanation. URA is less toxic
218:03 arrow. Explanation. URA is less toxic than ammonia.
218:05 than ammonia. 580.
218:07 580. Exhaled air contains more. A. Oxygen. B.
218:12 Exhaled air contains more. A. Oxygen. B. Sugar. C. Carbon dioxide. D. Iron. Check
218:17 Sugar. C. Carbon dioxide. D. Iron. Check mark. Correct answer. C. Carbon dioxide.
218:20 mark. Correct answer. C. Carbon dioxide. Right arrow. Explanation. Cellular
218:23 Right arrow. Explanation. Cellular respiration releases CO.
218:26 respiration releases CO. 581.
218:29 581. Kidneys help in maintaining a
218:32 Kidneys help in maintaining a temperature, B water balance, C blood
218:36 temperature, B water balance, C blood clotting, D photosynthesis.
218:40 clotting, D photosynthesis. Check mark correct answer, B water
218:43 Check mark correct answer, B water balance. Right arrow explanation.
218:45 balance. Right arrow explanation. Kidneys regulate fluid levels.
218:49 Kidneys regulate fluid levels. 582.
218:51 582. The site of Arabic respiration is A.
218:55 The site of Arabic respiration is A. Ribosomes. B G bodies. C. Mitochondria.
219:01 Ribosomes. B G bodies. C. Mitochondria. D. Nucleus.
219:03 D. Nucleus. Check mark. Correct answer. C.
219:05 Check mark. Correct answer. C. Mitochondria. Right arrow. Explanation.
219:09 Mitochondria. Right arrow. Explanation. Mitochondria generate ATP with oxygen.
219:13 Mitochondria generate ATP with oxygen. 583
219:16 583 photosynthesis uses. A oxygen and water.
219:20 photosynthesis uses. A oxygen and water. B CO in water. C nitrogen and water. D
219:26 B CO in water. C nitrogen and water. D hydrogen and oxygen.
219:28 hydrogen and oxygen. Check mark. Correct answer. B. CO in
219:32 Check mark. Correct answer. B. CO in water. Right arrow. Explanation.
219:34 water. Right arrow. Explanation. Sunlight converts CO and water into
219:37 Sunlight converts CO and water into glucose.
219:39 glucose. 584.
219:42 584. Blood pressure is measured in A mhg
219:47 Blood pressure is measured in A mhg b m c g d degrees check mark correct
219:52 b m c g d degrees check mark correct answerg
219:55 answerg right arrow explanation blood pressure
219:58 right arrow explanation blood pressure is measured in millm of mercury
220:02 is measured in millm of mercury 585
220:05 585 mucus in the respiratory tract a traps
220:08 mucus in the respiratory tract a traps dust b forms RBC's C carries oxygen. D
220:15 dust b forms RBC's C carries oxygen. D produces bile.
220:17 produces bile. Check mark. Correct answer. A traps
220:20 Check mark. Correct answer. A traps dust. Right arrow. Explanation. Mucus
220:23 dust. Right arrow. Explanation. Mucus keeps airways clean.
220:26 keeps airways clean. 586.
220:29 586. Water lost through stoometer is called.
220:32 Water lost through stoometer is called. A perspiration, B excretion, C
220:36 A perspiration, B excretion, C transpiration, D filtration.
220:39 transpiration, D filtration. Check mark. Correct answer. C.
220:42 Check mark. Correct answer. C. Transpiration. Right arrow. Explanation.
220:45 Transpiration. Right arrow. Explanation. Plants lose water as vapor.
220:49 Plants lose water as vapor. 587.
220:51 587. Blood leaving lungs as rich in A. CO. B.
220:56 Blood leaving lungs as rich in A. CO. B. Nitrogen. C. Oxygen. D. URA.
221:01 Nitrogen. C. Oxygen. D. URA. Check mark. Correct answer. C. Oxygen.
221:04 Check mark. Correct answer. C. Oxygen. Right arrow. Explanation. Lungs
221:06 Right arrow. Explanation. Lungs oxygenate blood.
221:09 oxygenate blood. 588.
221:12 588. The stomach secretes A. Bile, B
221:15 The stomach secretes A. Bile, B hydrochloric acid, C saliva, D. Sweat.
221:20 hydrochloric acid, C saliva, D. Sweat. Check mark. Correct answer. B
221:23 Check mark. Correct answer. B hydrochloric acid. Right arrow.
221:25 hydrochloric acid. Right arrow. Explanation. HCL helps digestion in
221:28 Explanation. HCL helps digestion in stomach.
221:30 stomach. 589.
221:33 589. The instrument to hear heartbeats is a
221:37 The instrument to hear heartbeats is a barometer, B. Thermometer. C.
221:40 barometer, B. Thermometer. C. Stethoscope. D. Hydrometer.
221:43 Stethoscope. D. Hydrometer. Check mark. Correct answer. C.
221:46 Check mark. Correct answer. C. Stethoscope. Right arrow. Explanation.
221:49 Stethoscope. Right arrow. Explanation. Doctors use stethoscope to listen to
221:52 Doctors use stethoscope to listen to heart.
221:53 heart. 590.
221:55 590. The smallest blood vessels are a
221:58 The smallest blood vessels are a arteries, bins,
222:01 arteries, bins, capillaries,
222:02 capillaries, d bronchioles.
222:05 d bronchioles. Check mark. Correct answer. C.
222:07 Check mark. Correct answer. C. Capillaries. Right arrow. Explanation.
222:10 Capillaries. Right arrow. Explanation. Capillaries connect arteries and veins.
222:14 Capillaries connect arteries and veins. 591.
222:17 591. The mouth produces A. Bile. B. Saliva.
222:21 The mouth produces A. Bile. B. Saliva. C. URA. D. Oxygen.
222:25 C. URA. D. Oxygen. Check mark. Correct answer. B. Saliva.
222:28 Check mark. Correct answer. B. Saliva. Right arrow. Explanation. Saliva starts
222:32 Right arrow. Explanation. Saliva starts digestion.
222:34 digestion. 592.
222:36 592. Carbon dioxide combines with water to
222:39 Carbon dioxide combines with water to form A. Alcohol, B sulfuric acid, C
222:44 form A. Alcohol, B sulfuric acid, C carbonic acid, D glucose.
222:48 carbonic acid, D glucose. Check mark correct answer C carbonic
222:51 Check mark correct answer C carbonic acid. Right arrow explanation. Co-
222:54 acid. Right arrow explanation. Co- dissolves in water is carbonic acid.
222:58 dissolves in water is carbonic acid. 593
223:01 593 Willie are present in A kidneys, B
223:04 Willie are present in A kidneys, B lungs, C small intestine, D brain.
223:09 lungs, C small intestine, D brain. Check mark correct answer C small
223:12 Check mark correct answer C small intestine. Right arrow explanation will
223:16 intestine. Right arrow explanation will increase surface for absorption.
223:19 increase surface for absorption. 594.
223:22 594. Blood coming to heart is A pure, B
223:26 Blood coming to heart is A pure, B impure, C air, D water.
223:30 impure, C air, D water. Check mark correct answer. B impure.
223:33 Check mark correct answer. B impure. Right arrow. Explanation. Veins carry
223:36 Right arrow. Explanation. Veins carry impure blood to heart.
223:38 impure blood to heart. 595.
223:41 595. Urine passes from kidney to bladder
223:44 Urine passes from kidney to bladder wire. A. Urethra. B. Bronus. C.
223:48 wire. A. Urethra. B. Bronus. C. Eophagus. D. Ureita.
223:51 Eophagus. D. Ureita. Check mark. Correct answer. D. Urita
223:54 Check mark. Correct answer. D. Urita right arrow. Explanation. Ureita carries
223:58 right arrow. Explanation. Ureita carries urine to bladder.
224:00 urine to bladder. 596.
224:03 596. Guard cells surround. A. Xylm. B.
224:07 Guard cells surround. A. Xylm. B. Stoometer. C. Flowim. D. Broni.
224:11 Stoometer. C. Flowim. D. Broni. Check mark. Correct answer. B.
224:14 Check mark. Correct answer. B. Stoometer. Right arrow. Explanation.
224:17 Stoometer. Right arrow. Explanation. Guard cells. Open and close stoometer.
224:20 Guard cells. Open and close stoometer. 597.
224:23 597. Bronchitis effects. A stomach. B. Lungs.
224:28 Bronchitis effects. A stomach. B. Lungs. C. Heart. D. Kidneys.
224:31 C. Heart. D. Kidneys. Check mark. Correct answer. B. Lungs.
224:34 Check mark. Correct answer. B. Lungs. Right arrow. Explanation. Bronchitis
224:38 Right arrow. Explanation. Bronchitis inflames bronchial tubes.
224:41 inflames bronchial tubes. 598.
224:43 598. Enzymes are mainly made of a fat, b
224:48 Enzymes are mainly made of a fat, b carbohydrate, c protein, d water.
224:52 carbohydrate, c protein, d water. Check mark correct answer. C protein.
224:55 Check mark correct answer. C protein. Right arrow. Explanation. Enzymes are
224:58 Right arrow. Explanation. Enzymes are biological catalysts.
225:01 biological catalysts. 599.
225:04 599. Plants store glucose as a fat, b ura, c
225:09 Plants store glucose as a fat, b ura, c starch, d protein.
225:12 starch, d protein. Check mark. Correct answer. C. Star
225:15 Check mark. Correct answer. C. Star starch. Right arrow. Explanation. Excess
225:18 starch. Right arrow. Explanation. Excess glucose becomes starch.
225:21 glucose becomes starch. 600. The excretory unit in kidney is A.
225:26 600. The excretory unit in kidney is A. Bronus, B. Atrium, C. Nefron, D. Willie.
225:32 Bronus, B. Atrium, C. Nefron, D. Willie. Check mark. Correct answer. C. Nefron.
225:35 Check mark. Correct answer. C. Nefron. Right arrow. Explanation. Nephron
225:38 Right arrow. Explanation. Nephron filters blood to form urine.
225:41 filters blood to form urine. 61.
225:43 61. The pigment in plants that captures
225:45 The pigment in plants that captures sunlight is A. Melanin, B hemoglobin, C
225:50 sunlight is A. Melanin, B hemoglobin, C chlorophyll, D X zanthophil.
225:54 chlorophyll, D X zanthophil. Check mark. Correct answer. C
225:56 Check mark. Correct answer. C chlorophyll. Right arrow. Explanation.
225:59 chlorophyll. Right arrow. Explanation. Chlorophyll absorbs light for
226:01 Chlorophyll absorbs light for photosynthesis.
226:03 photosynthesis. 62.
226:05 62. The part of the brain that controls
226:07 The part of the brain that controls breathing is A cerebrum, B cerebellum, C
226:13 breathing is A cerebrum, B cerebellum, C mela oblongata, D corpus colosum. Check
226:17 mela oblongata, D corpus colosum. Check mark correct answer, C mela oblongata.
226:20 mark correct answer, C mela oblongata. Right arrow explanation. Modela manages
226:23 Right arrow explanation. Modela manages involuntary actions like breathing.
226:27 involuntary actions like breathing. 63.
226:29 63. Sweat is mainly composed of a fat and
226:33 Sweat is mainly composed of a fat and bile, b water and salts, c protein and
226:37 bile, b water and salts, c protein and ura, d glucose and starch.
226:41 ura, d glucose and starch. Check mark correct answer. B water and
226:44 Check mark correct answer. B water and salts. Right arrow explanation. Sweat
226:47 salts. Right arrow explanation. Sweat regulates temperature and removes waste
226:50 regulates temperature and removes waste salts.
226:52 salts. 64.
226:54 64. Which organ helps detoxify blood? A.
226:58 Which organ helps detoxify blood? A. Heart. B. Liver. C. Pancreas. D. Lungs.
227:03 Heart. B. Liver. C. Pancreas. D. Lungs. Check mark. Correct answer. B. Liver.
227:06 Check mark. Correct answer. B. Liver. Right arrow. Explanation. The liver
227:09 Right arrow. Explanation. The liver neutralizes toxins.
227:12 neutralizes toxins. 65.
227:14 65. The blood cell that fights infection is
227:17 The blood cell that fights infection is A R B C B. Platelet C WBC D neuron.
227:25 A R B C B. Platelet C WBC D neuron. Check mark. Correct answer. C WBC right
227:29 Check mark. Correct answer. C WBC right arrow explanation white blood cells
227:32 arrow explanation white blood cells protect against diseases.
227:35 protect against diseases. 66.
227:37 66. The functional unit of lungs is A
227:40 The functional unit of lungs is A bronchus, B alvololis, C trachea, D
227:45 bronchus, B alvololis, C trachea, D bronchial.
227:46 bronchial. Check mark correct answer. B alvolus
227:50 Check mark correct answer. B alvolus right arrow explanation. Alvoli exchange
227:53 right arrow explanation. Alvoli exchange oxygen and CO.
227:56 oxygen and CO. 67.
227:58 67. Photosynthesis occurs in A mitochondria,
228:02 Photosynthesis occurs in A mitochondria, B. Chloroplast, C. Ribosome, D. G body.
228:08 B. Chloroplast, C. Ribosome, D. G body. Check mark. Correct answer. B.
228:11 Check mark. Correct answer. B. Chloroplast. Right arrow. Explanation.
228:14 Chloroplast. Right arrow. Explanation. Chloroplasts contain chlorophyll.
228:17 Chloroplasts contain chlorophyll. 68.
228:19 68. Hemoglobin binds with A. Nitrogen, B
228:23 Hemoglobin binds with A. Nitrogen, B oxygen, C water vapor, D ammonia.
228:28 oxygen, C water vapor, D ammonia. Check mark. Correct answer. B oxygen.
228:32 Check mark. Correct answer. B oxygen. Right arrow explanation. Hemoglobin
228:34 Right arrow explanation. Hemoglobin carries oxygen in blood.
228:38 carries oxygen in blood. 609.
228:39 609. Plants transport food through A. Xylm.
228:43 Plants transport food through A. Xylm. B. Flim. C. Stometer. D. Guard cells.
228:49 B. Flim. C. Stometer. D. Guard cells. Check mark. Correct answer. B. Flowm.
228:52 Check mark. Correct answer. B. Flowm. Right arrow. Explanation. Flom
228:55 Right arrow. Explanation. Flom distributes sugars and nutrients.
228:58 distributes sugars and nutrients. 610.
229:00 610. The waste product exhaled by humans is A
229:04 The waste product exhaled by humans is A nitrogen, B oxygen, C carbon dioxide, D
229:10 nitrogen, B oxygen, C carbon dioxide, D sulfur dioxide.
229:12 sulfur dioxide. Check mark correct answer C carbon
229:15 Check mark correct answer C carbon dioxide. Right arrow explanation. CO is
229:18 dioxide. Right arrow explanation. CO is a byproduct of respiration.
229:22 a byproduct of respiration. 611.
229:24 611. Which organ removes carbon dioxide from
229:27 Which organ removes carbon dioxide from blood? A. Kidneys. B. Liver. C. Lungs.
229:32 blood? A. Kidneys. B. Liver. C. Lungs. D. Stomach.
229:34 D. Stomach. Check mark. Correct answer. C. Lungs.
229:37 Check mark. Correct answer. C. Lungs. Right arrow. Explanation. Lungs expel CO
229:41 Right arrow. Explanation. Lungs expel CO during breathing.
229:43 during breathing. 612.
229:45 612. The valve on the right side of heart is
229:48 The valve on the right side of heart is A. Bicuspid, B mital, C triricuspid, D
229:53 A. Bicuspid, B mital, C triricuspid, D aotic.
229:55 aotic. Check mark. Correct answer. C
229:58 Check mark. Correct answer. C triricuspid. Right. Arrow explanation.
230:00 triricuspid. Right. Arrow explanation. Triricusper valve prevents backflow.
230:04 Triricusper valve prevents backflow. 613.
230:07 613. URA is a product of A. Fat digestion, B.
230:12 URA is a product of A. Fat digestion, B. Carbohydrate breakdown, C. Protein
230:15 Carbohydrate breakdown, C. Protein metabolism, DNA synthesis.
230:19 metabolism, DNA synthesis. Check mark correct answer. C. Protein
230:22 Check mark correct answer. C. Protein metabolism. Right arrow explanation. URA
230:26 metabolism. Right arrow explanation. URA forms from amino acid breakdown.
230:30 forms from amino acid breakdown. 614
230:32 614 stoometer allow. A food storage. B gas
230:36 stoometer allow. A food storage. B gas exchange. C reproduction. D light
230:40 exchange. C reproduction. D light reflection.
230:42 reflection. Check mark. Correct answer. B. Gas
230:45 Check mark. Correct answer. B. Gas exchange. Right arrow explanation.
230:48 exchange. Right arrow explanation. Stormeter regulate co flow.
230:52 Stormeter regulate co flow. 615.
230:54 615. The fluid part of blood is called A
230:57 The fluid part of blood is called A serum, B plasma, C lymph, D mucus.
231:03 serum, B plasma, C lymph, D mucus. Check mark correct answer. B plasma.
231:06 Check mark correct answer. B plasma. Right arrow explanation. Plasma carries
231:09 Right arrow explanation. Plasma carries nutrients and wastes.
231:12 nutrients and wastes. 616.
231:14 616. The process of sweating helps. A.
231:18 The process of sweating helps. A. Respiration. B. Digestion. C. Cooling
231:21 Respiration. B. Digestion. C. Cooling the body. D. making enzymes.
231:25 the body. D. making enzymes. Check mark. Correct answer. C. Cooling
231:28 Check mark. Correct answer. C. Cooling the body. Right arrow. Explanation.
231:31 the body. Right arrow. Explanation. Sweat evaporates. Cooling the skin.
231:35 Sweat evaporates. Cooling the skin. 617.
231:37 617. Bile helps in digesting. A. Sugar. B.
231:41 Bile helps in digesting. A. Sugar. B. Protein. C. Fat. D. Minerals.
231:46 Protein. C. Fat. D. Minerals. Check mark. Correct answer. C. Fat.
231:49 Check mark. Correct answer. C. Fat. Right arrow. Explanation. Bile
231:51 Right arrow. Explanation. Bile emulsifies fats.
231:54 emulsifies fats. 618.
231:56 618. Plants store extra glucose as a protein,
232:00 Plants store extra glucose as a protein, B starch, C ura, D chlorophyll.
232:06 B starch, C ura, D chlorophyll. Check mark correct answer. B starch
232:09 Check mark correct answer. B starch right arrow. Explanation. Starch stores
232:12 right arrow. Explanation. Starch stores energy in plants.
232:15 energy in plants. 619.
232:17 619. Which organ has willie for absorption?
232:20 Which organ has willie for absorption? A. Stomach, B. Small intestine, C
232:24 A. Stomach, B. Small intestine, C kidney, D. Lungs.
232:27 kidney, D. Lungs. Check mark. Correct answer. B. Small
232:30 Check mark. Correct answer. B. Small intestine. Right arrow. Explanation.
232:33 intestine. Right arrow. Explanation. Willy absorb nutrients into blood.
232:36 Willy absorb nutrients into blood. 620.
232:38 620. The respiratory pigment in humans is A.
232:42 The respiratory pigment in humans is A. Melanin, B. Chlorophyll, C. Hemoglobin,
232:47 Melanin, B. Chlorophyll, C. Hemoglobin, D. Keratin. Check mark. Correct answer.
232:50 D. Keratin. Check mark. Correct answer. C hemoglobin right arrow explanation.
232:53 C hemoglobin right arrow explanation. Hemoglobin binds oxygen.
232:57 Hemoglobin binds oxygen. 621.
232:59 621. Food is pushed down by A. Paristalysis,
233:03 Food is pushed down by A. Paristalysis, B. Filtration, C digestion only, D.
233:07 B. Filtration, C digestion only, D. Evaporation.
233:09 Evaporation. Check mark. Correct answer. A.
233:12 Check mark. Correct answer. A. Paristalysis. Right arrow. Explanation.
233:15 Paristalysis. Right arrow. Explanation. Paristalysis is wavelike muscle
233:17 Paristalysis is wavelike muscle movement.
233:19 movement. 622
233:22 622 plants absorb water through A leaves, B
233:26 plants absorb water through A leaves, B flowers, C roots, D fruits.
233:31 flowers, C roots, D fruits. Check mark correct answer. C roots.
233:34 Check mark correct answer. C roots. Right arrow. Explanation. Roots draw
233:37 Right arrow. Explanation. Roots draw water from soil.
233:39 water from soil. 623.
233:42 623. An aerobic respiration does not require
233:46 An aerobic respiration does not require A glucose, B enzymes, C oxygen, D ATP.
233:52 A glucose, B enzymes, C oxygen, D ATP. Check mark correct answer. C oxygen.
233:56 Check mark correct answer. C oxygen. Right arrow. Explanation. Anorobic
233:59 Right arrow. Explanation. Anorobic processes occur without oxygen.
234:02 processes occur without oxygen. 624.
234:05 624. The excretoryy organ in earthworm is a
234:08 The excretoryy organ in earthworm is a lungs b malpigian tubules c nefridia d
234:14 lungs b malpigian tubules c nefridia d gills.
234:15 gills. Check mark correct answer. C nefridia
234:18 Check mark correct answer. C nefridia right arrow explanation. Nefridia remove
234:22 right arrow explanation. Nefridia remove wastes in earthworms.
234:25 wastes in earthworms. 625.
234:27 625. The main function of platelets is A
234:31 The main function of platelets is A carry oxygen, B fight germs, C clot
234:35 carry oxygen, B fight germs, C clot blood, D store fat. Check mark correct
234:40 blood, D store fat. Check mark correct answer. C clot blood. Right arrow.
234:43 answer. C clot blood. Right arrow. Explanation. Platelets help seal wounds.
234:47 Explanation. Platelets help seal wounds. 626.
234:50 626. The small air sacks in lungs are called
234:53 The small air sacks in lungs are called A. Willie, B. Alvoli, C. Nephrons D
234:58 A. Willie, B. Alvoli, C. Nephrons D nodes.
235:00 nodes. Check mark. Correct answer. B. Alvoli.
235:03 Check mark. Correct answer. B. Alvoli. Right arrow. Explanation. Alvoli enable
235:06 Right arrow. Explanation. Alvoli enable gas exchange.
235:09 gas exchange. 627.
235:12 627. Urine is stored in the A. Kidney. B.
235:16 Urine is stored in the A. Kidney. B. Urea. C. Urethra. D. Urinary bladder.
235:21 Urea. C. Urethra. D. Urinary bladder. Check mark. Correct answer. D. Urinary
235:24 Check mark. Correct answer. D. Urinary bladder. Right arrow. Explanation:
235:27 bladder. Right arrow. Explanation: Bladder stores urine until excretion.
235:31 Bladder stores urine until excretion. 628.
235:33 628. The human heart has A one chamber, B two
235:38 The human heart has A one chamber, B two chambers, C three chambers, D four
235:42 chambers, C three chambers, D four chambers.
235:44 chambers. Check mark. Correct answer. D. Four
235:47 Check mark. Correct answer. D. Four chambers. Right arrow. Explanation.
235:50 chambers. Right arrow. Explanation. Heart has two atria and two ventricles.
235:54 Heart has two atria and two ventricles. 629.
235:57 629. Gut cells control. A. Digestion. B. Gas
236:01 Gut cells control. A. Digestion. B. Gas exchange. C. Vision. D. Hearing. Check
236:06 exchange. C. Vision. D. Hearing. Check mark. Correct answer. B. Gas exchange.
236:09 mark. Correct answer. B. Gas exchange. Right arrow. Explanation. Guard cells.
236:12 Right arrow. Explanation. Guard cells. Open and close to
236:15 Open and close to 630.
236:17 630. The pigment essential for photosynthesis
236:20 The pigment essential for photosynthesis is a hemoglobin. B. Melanin. C.
236:25 is a hemoglobin. B. Melanin. C. Chlorophyll. D. Albumin.
236:28 Chlorophyll. D. Albumin. Check mark. Correct answer. C.
236:30 Check mark. Correct answer. C. Chlorophyll. Right arrow. Explanation.
236:33 Chlorophyll. Right arrow. Explanation. Chlorophyll traps sunlight.
236:36 Chlorophyll traps sunlight. 631.
236:39 631. The process of removing waste from blood
236:42 The process of removing waste from blood is A. Photosynthesis, B. Filtration, C
236:47 is A. Photosynthesis, B. Filtration, C transpiration, D ingestion.
236:50 transpiration, D ingestion. Check mark. Correct answer B.
236:53 Check mark. Correct answer B. Filtration. Right arrow. Explanation.
236:56 Filtration. Right arrow. Explanation. Kidneys filter waste.
236:59 Kidneys filter waste. 632.
237:01 632. The digestive enzyme in saliva is A.
237:05 The digestive enzyme in saliva is A. Pepsin. B. Ama. C. Lipase. D. Trison.
237:11 Pepsin. B. Ama. C. Lipase. D. Trison. Check mark. Correct answer. B. Ama.
237:14 Check mark. Correct answer. B. Ama. Right arrow. Explanation. Ama breaks
237:17 Right arrow. Explanation. Ama breaks down starch.
237:20 down starch. 633.
237:22 633. The human circulatory system is A open,
237:26 The human circulatory system is A open, B closed, C partly open, D none.
237:32 B closed, C partly open, D none. Check mark. Correct answer. B closed.
237:35 Check mark. Correct answer. B closed. Right arrow. Explanation. Blood flows
237:38 Right arrow. Explanation. Blood flows inside vessels.
237:40 inside vessels. 634.
237:43 634. The functional unit of kidney is a
237:46 The functional unit of kidney is a neuron, b nephron, c alvolus, d willie.
237:52 neuron, b nephron, c alvolus, d willie. Check mark correct answer. B nephron
237:55 Check mark correct answer. B nephron right arrow explanation. Nephron filters
237:58 right arrow explanation. Nephron filters blood to form urine.
238:01 blood to form urine. 635.
238:04 635. Photosynthesis releases. A CO B. Oxygen
238:09 Photosynthesis releases. A CO B. Oxygen C. Nitrogen D. Water vapor.
238:13 C. Nitrogen D. Water vapor. Check mark. Correct answer. B. Oxygen.
238:17 Check mark. Correct answer. B. Oxygen. Right arrow. Explanation. Plants produce
238:20 Right arrow. Explanation. Plants produce O during photosynthesis.
238:23 O during photosynthesis. 636.
238:26 636. The tube leading urine out of body is a
238:30 The tube leading urine out of body is a ureita, B urethra, C bronchus, D lymph
238:35 ureita, B urethra, C bronchus, D lymph duct. Check mark. Correct answer. B.
238:39 duct. Check mark. Correct answer. B. Urethra. Right arrow. Explanation:
238:42 Urethra. Right arrow. Explanation: Urethra expels urine.
238:45 Urethra expels urine. 637.
238:47 637. Blood in arteries is usually A blue. B
238:52 Blood in arteries is usually A blue. B dark dark, C oxygenated, D
238:55 dark dark, C oxygenated, D deoxxygenated.
238:57 deoxxygenated. Check mark. Correct answer. C.
239:00 Check mark. Correct answer. C. Oxygenated. Right arrow. Explanation.
239:03 Oxygenated. Right arrow. Explanation. Arteries carry oxygenrich blood.
239:07 Arteries carry oxygenrich blood. 638.
239:09 638. The flap that closes the wind pipe is A
239:13 The flap that closes the wind pipe is A valve, B epiglotus, C diaphragm, D
239:18 valve, B epiglotus, C diaphragm, D nephron. Check mark. Correct answer. B
239:21 nephron. Check mark. Correct answer. B epiglotus. Right arrow. Explanation.
239:24 epiglotus. Right arrow. Explanation. Epiglotus prevents food entry into
239:26 Epiglotus prevents food entry into trachea.
239:28 trachea. 639.
239:31 639. Blood vessels that carry blood to heart.
239:34 Blood vessels that carry blood to heart. A. Arteries. B. Veins. C. Bronchules. D.
239:39 A. Arteries. B. Veins. C. Bronchules. D. Alvoli.
239:41 Alvoli. Check mark. Correct answer. B. Ways.
239:44 Check mark. Correct answer. B. Ways. Right arrow. Explanation. Way veins
239:47 Right arrow. Explanation. Way veins carry blood toward the heart.
239:50 carry blood toward the heart. 640.
239:52 640. Urine formation happens in A heart, B
239:56 Urine formation happens in A heart, B nephron, C bronchi, D lungs.
240:01 nephron, C bronchi, D lungs. Check mark. Correct answer. B. Nefron.
240:04 Check mark. Correct answer. B. Nefron. Right arrow. Explanation. Nefrons filter
240:07 Right arrow. Explanation. Nefrons filter waste to make urine.
240:10 waste to make urine. 641
240:12 641 Transpiration helps in A cooling leaves,
240:16 Transpiration helps in A cooling leaves, B making enzymes, C. Producing seeds, D.
240:21 B making enzymes, C. Producing seeds, D. Oxygen transport.
240:23 Oxygen transport. Check mark. Correct answer. A. Cooling
240:26 Check mark. Correct answer. A. Cooling leaves. Right arrow. Explanation.
240:29 leaves. Right arrow. Explanation. Transpiration cools plant surfaces.
240:33 Transpiration cools plant surfaces. 642.
240:36 642. The circulatory fluid in humans says A
240:39 The circulatory fluid in humans says A plasma only, B lymph only, C blood, D
240:44 plasma only, B lymph only, C blood, D enzymes.
240:46 enzymes. Check mark correct answer. C blood right
240:50 Check mark correct answer. C blood right arrow explanation. Blood carries oxygen
240:53 arrow explanation. Blood carries oxygen and nutrients.
240:55 and nutrients. 643.
240:58 643. In an aerobic respiration, yeast
241:01 In an aerobic respiration, yeast produces
241:02 produces A water, B ethanol and CO, C oxygen
241:07 A water, B ethanol and CO, C oxygen only, D starch.
241:10 only, D starch. Check mark correct answer. B ethanol and
241:13 Check mark correct answer. B ethanol and CO right arrow. Explanation yeast
241:16 CO right arrow. Explanation yeast fermentss sugar without oxygen.
241:20 fermentss sugar without oxygen. 644.
241:22 644. The liquid part left after clotting is A
241:26 The liquid part left after clotting is A plasma, B serum, C lymph, D saliva.
241:32 plasma, B serum, C lymph, D saliva. Check mark correct answer. B serum.
241:36 Check mark correct answer. B serum. Right arrow explanation. Serum lacks
241:39 Right arrow explanation. Serum lacks clotting proteins.
241:41 clotting proteins. 645.
241:44 645. Plant roots absorb water through. A.
241:47 Plant roots absorb water through. A. Xylm. B flim. C. Root hair has D. Guard
241:52 Xylm. B flim. C. Root hair has D. Guard cells.
241:54 cells. Check mark. Correct answer. C. Root
241:57 Check mark. Correct answer. C. Root hairs. Right arrow. Explanation. Root
242:00 hairs. Right arrow. Explanation. Root hairs increase absorption area.
242:04 hairs increase absorption area. 646.
242:06 646. URA is formed in A lungs, B liver, C
242:11 URA is formed in A lungs, B liver, C stomach, D heart. Check mark. Correct
242:15 stomach, D heart. Check mark. Correct answer. B liver. Right arrow.
242:18 answer. B liver. Right arrow. Explanation. Liver converts ammonia to
242:21 Explanation. Liver converts ammonia to ura.
242:23 ura. 647.
242:25 647. Which organ stores bile? A. Pancreas. B.
242:30 Which organ stores bile? A. Pancreas. B. Gall bladder. C. Kidney. D. Lungs.
242:34 Gall bladder. C. Kidney. D. Lungs. Check mark. Correct answer. B. Gallb
242:37 Check mark. Correct answer. B. Gallb bladder. Right arrow. Explanation.
242:40 bladder. Right arrow. Explanation. Gallbladder stores bile until needed.
242:44 Gallbladder stores bile until needed. 648.
242:46 648. The energy released in cells is stored
242:49 The energy released in cells is stored as a dna b chlorophyll cp
242:56 as a dna b chlorophyll cp d ura. Check mark correct answer cp
243:01 d ura. Check mark correct answer cp right arrow. Explanation ATP stores
243:04 right arrow. Explanation ATP stores usable cell energy.
243:07 usable cell energy. 649.
243:10 649. Exhalation expels a oxygen b sugar c.
243:15 Exhalation expels a oxygen b sugar c. Carbon dioxide D. Protein.
243:19 Carbon dioxide D. Protein. Check mark. Correct answer. C. Carbon
243:22 Check mark. Correct answer. C. Carbon dioxide. Right arrow. Explanation. CO
243:25 dioxide. Right arrow. Explanation. CO leaves the body in exhaled air.
243:29 leaves the body in exhaled air. 650.
243:31 650. The blood vessel carrying blood from
243:33 The blood vessel carrying blood from heart to lungs is A. Pulmonary vein, B
243:37 heart to lungs is A. Pulmonary vein, B pulmonary artery, C renal artery, D
243:41 pulmonary artery, C renal artery, D hpatic vein. Check mark. Correct answer
243:45 hpatic vein. Check mark. Correct answer B. Pulmonary artery. Right arrow.
243:48 B. Pulmonary artery. Right arrow. Explanation. Pulmonary artery carries
243:51 Explanation. Pulmonary artery carries deoxxygenated blood to lungs.
243:54 deoxxygenated blood to lungs. 651.
243:57 651. The pigment responsible for red color of
244:00 The pigment responsible for red color of blood is a melanin b chlorophyll c
244:04 blood is a melanin b chlorophyll c hemoglobin d kerotene.
244:08 hemoglobin d kerotene. Check mark correct answer. C hemoglobin.
244:11 Check mark correct answer. C hemoglobin. Right arrow explanation. Hemoglobin
244:14 Right arrow explanation. Hemoglobin binds oxygen and gives red color.
244:18 binds oxygen and gives red color. 652.
244:20 652. The inner wall of small intestine has A.
244:24 The inner wall of small intestine has A. Hair follicles, B. Willie, Celia, D.
244:29 Hair follicles, B. Willie, Celia, D. Bronchioles.
244:31 Bronchioles. Check mark. Correct answer. B. Willie.
244:34 Check mark. Correct answer. B. Willie. Right arrow. Explanation. Willie.
244:36 Right arrow. Explanation. Willie. Increase surface area for absorption.
244:40 Increase surface area for absorption. 653.
244:43 653. Plants release oxygen during A
244:46 Plants release oxygen during A transpiration, B photosynthesis, C
244:50 transpiration, B photosynthesis, C respiration, Digestion.
244:54 respiration, Digestion. Check mark correct answer. B
244:56 Check mark correct answer. B photosynthesis. Right arrow.
244:58 photosynthesis. Right arrow. Explanation. Oxygen is a byproduct of
245:01 Explanation. Oxygen is a byproduct of photosynthesis.
245:04 photosynthesis. 654.
245:06 654. What carries digested food in plants? A.
245:11 What carries digested food in plants? A. Xylm. B. Flowm C guard cells D stoometer
245:17 Xylm. B. Flowm C guard cells D stoometer check mark correct answer B flim right
245:20 check mark correct answer B flim right arrow explanation FM transports food to
245:24 arrow explanation FM transports food to plant parts
245:26 plant parts 655
245:29 655 which chamber of heart receives
245:31 which chamber of heart receives oxygenrich blood.
245:34 oxygenrich blood. Right atrium, B. Left atrium, C. Right
245:38 Right atrium, B. Left atrium, C. Right ventricle, D. Left ventricle.
245:42 ventricle, D. Left ventricle. Check mark. Correct answer. B. Left
245:45 Check mark. Correct answer. B. Left atrium. Right arrow. Explanation. Left
245:48 atrium. Right arrow. Explanation. Left atrium receives blood from lungs.
245:52 atrium receives blood from lungs. 656.
245:54 656. Kidneys regulate. A. Carbon dioxide
245:58 Kidneys regulate. A. Carbon dioxide level. B. Hormone secretion. C. Water
246:02 level. B. Hormone secretion. C. Water balance. D. Oxygen level.
246:05 balance. D. Oxygen level. Check mark. Correct answer. C. Water
246:08 Check mark. Correct answer. C. Water balance. Right arrow. Explanation.
246:11 balance. Right arrow. Explanation. Kidneys control fluid levels and salts.
246:15 Kidneys control fluid levels and salts. 657.
246:18 657. Carbon dioxide is removed from body by
246:22 Carbon dioxide is removed from body by A. Kidneys, B lungs, C liver, D
246:26 A. Kidneys, B lungs, C liver, D pancreas.
246:28 pancreas. Check mark. Correct answer. B. Lungs.
246:31 Check mark. Correct answer. B. Lungs. Right arrow. Explanation: CO is expelled
246:34 Right arrow. Explanation: CO is expelled during exhalation.
246:37 during exhalation. 658.
246:39 658. The diaphragm helps in A. Digestion, B
246:44 The diaphragm helps in A. Digestion, B respiration, C excretion, D
246:47 respiration, C excretion, D reproduction.
246:49 reproduction. Check mark correct answer. B
246:52 Check mark correct answer. B respiration. Right arrow. Explanation.
246:55 respiration. Right arrow. Explanation. Diaphragm aids in inhalation and
246:57 Diaphragm aids in inhalation and exhalation.
246:59 exhalation. 659.
247:02 659. The circulatory system in humans is A
247:06 The circulatory system in humans is A open, B closed, C partial, D none. Check
247:11 open, B closed, C partial, D none. Check mark. Correct answer. B closed. Right
247:15 mark. Correct answer. B closed. Right arrow. Explanation. Blood circulates in
247:18 arrow. Explanation. Blood circulates in vessels.
247:20 vessels. 660.
247:22 660. Gills help fish in A. Digestion, B.
247:26 Gills help fish in A. Digestion, B. Respiration, C locomotion, D
247:29 Respiration, C locomotion, D reproduction.
247:31 reproduction. Check mark. Correct answer. B.
247:34 Check mark. Correct answer. B. Respiration. Right arrow. Explanation
247:37 Respiration. Right arrow. Explanation gives extract the oxygen from water.
247:41 gives extract the oxygen from water. 661.
247:43 661. Excess glucose in human body is stored
247:46 Excess glucose in human body is stored as a protein b glycogen c ura dna.
247:54 as a protein b glycogen c ura dna. Check mark. Correct answer. B glycogen.
247:57 Check mark. Correct answer. B glycogen. Right arrow. Explanation. Liver stores
248:00 Right arrow. Explanation. Liver stores glucose as glycogen
248:03 glucose as glycogen 662.
248:06 662. The unit of energy is a kilogram, B
248:10 The unit of energy is a kilogram, B mutton, C jewel, D walt.
248:14 mutton, C jewel, D walt. Check mark correct answer. C jewel.
248:17 Check mark correct answer. C jewel. Right arrow explanation. Jewel measures
248:20 Right arrow explanation. Jewel measures energy.
248:22 energy. 663.
248:25 663. The opening in leaf for gas exchanges.
248:29 The opening in leaf for gas exchanges. A. Willie. B. Stoometer. C. Nefrons. D.
248:34 A. Willie. B. Stoometer. C. Nefrons. D. Lumen. Check mark. Correct answer. B.
248:37 Lumen. Check mark. Correct answer. B. Stormeter. Right arrow. Explanation.
248:40 Stormeter. Right arrow. Explanation. Stoometer control gas flow in leaves.
248:44 Stoometer control gas flow in leaves. 664.
248:46 664. The left ventricle pumps blood to A.
248:50 The left ventricle pumps blood to A. Lungs. B. Brain. C. Whole body. D.
248:54 Lungs. B. Brain. C. Whole body. D. Liver.
248:56 Liver. Check mark. Correct answer. C. Whole
248:59 Check mark. Correct answer. C. Whole body right arrow explanation. Left
249:02 body right arrow explanation. Left ventricle pumps oxygenated blood
249:04 ventricle pumps oxygenated blood systemically.
249:06 systemically. 665.
249:09 665. Oxygenated blood comes to heart wire. A.
249:13 Oxygenated blood comes to heart wire. A. Pulmonary vein. B. Pulmonary artery. C.
249:17 Pulmonary vein. B. Pulmonary artery. C. Hpatic portal vein. D. Aort.
249:21 Hpatic portal vein. D. Aort. Check mark. Correct answer. A. Pulmonary
249:24 Check mark. Correct answer. A. Pulmonary vein. Right arrow. Explanation.
249:26 vein. Right arrow. Explanation. Pulmonary vein carries blood from lungs.
249:31 Pulmonary vein carries blood from lungs. 666.
249:33 666. An aerobic respiration produces A.
249:37 An aerobic respiration produces A. Oxygen. B. Alcohol or lactic acid. C.
249:41 Oxygen. B. Alcohol or lactic acid. C. Fat. D. Star starch.
249:44 Fat. D. Star starch. Check mark. Correct answer. B. Alcohol
249:47 Check mark. Correct answer. B. Alcohol or lactic acid. Right arrow.
249:50 or lactic acid. Right arrow. Explanation. Anerobic respiration
249:52 Explanation. Anerobic respiration creates these products.
249:55 creates these products. 667.
249:58 667. The tissue transporting water in plants
250:01 The tissue transporting water in plants says A flim, B XYM, C guard cells, D
250:07 says A flim, B XYM, C guard cells, D stoometer.
250:09 stoometer. Check mark correct answer. B X zylm.
250:12 Check mark correct answer. B X zylm. Right arrow explanation. Xyle carries
250:15 Right arrow explanation. Xyle carries water upwards.
250:18 water upwards. 668.
250:20 668. The fluid tissue of the body is a bone,
250:24 The fluid tissue of the body is a bone, b skin, c blood, d muscle.
250:29 b skin, c blood, d muscle. Check mark correct answer. C blood.
250:32 Check mark correct answer. C blood. Right arrow. Explanation. Blood as a
250:35 Right arrow. Explanation. Blood as a liquid connective tissue.
250:38 liquid connective tissue. 669.
250:40 669. The pigment essential for photosynthesis
250:43 The pigment essential for photosynthesis is A melanin, B chlorophyll, C
250:47 is A melanin, B chlorophyll, C hemoglobin, D keratin.
250:51 hemoglobin, D keratin. Check mark correct answer. B
250:53 Check mark correct answer. B chlorophyll. Right arrow. Explanation.
250:56 chlorophyll. Right arrow. Explanation. Chlorophyll absorbs light energy.
251:00 Chlorophyll absorbs light energy. 670.
251:02 670. Excreary products in plants can be
251:04 Excreary products in plants can be stored in A xyllem, B stoometer, C
251:09 stored in A xyllem, B stoometer, C vacules, D cuticle.
251:12 vacules, D cuticle. Check mark correct answer. C vacuuals.
251:16 Check mark correct answer. C vacuuals. Right arrow. Explanation. Vacules store
251:19 Right arrow. Explanation. Vacules store wastes in plants.
251:22 wastes in plants. 671.
251:24 671. The lungs are protected by A. Skull, B.
251:29 The lungs are protected by A. Skull, B. ribs. C. Pelvis, D. Spine.
251:33 ribs. C. Pelvis, D. Spine. Check mark. Correct answer. B. Ribs.
251:36 Check mark. Correct answer. B. Ribs. Right arrow. Explanation. Ribs form a
251:39 Right arrow. Explanation. Ribs form a cage around lungs.
251:42 cage around lungs. 672.
251:44 672. The functional unit of lungs is A.
251:48 The functional unit of lungs is A. Broni, B alvoli, C nephrons, D willie.
251:54 Broni, B alvoli, C nephrons, D willie. Check mark. Correct answer. B alvoli.
251:57 Check mark. Correct answer. B alvoli. Right arrow. Explanation: Gas exchange
252:00 Right arrow. Explanation: Gas exchange occurs in alvoli.
252:03 occurs in alvoli. 673.
252:06 673. Bile aids in a digestion of proteins. B
252:10 Bile aids in a digestion of proteins. B digestion of fats, C digestion of
252:14 digestion of fats, C digestion of carbohydrates, D. Respiration.
252:18 carbohydrates, D. Respiration. Check mark. Correct answer. B. Digestion
252:21 Check mark. Correct answer. B. Digestion of fats. Right arrow. Explanation. Bile
252:24 of fats. Right arrow. Explanation. Bile emulsifies fats for enzymes.
252:28 emulsifies fats for enzymes. 674.
252:30 674. The number of chambers in human heart is
252:34 The number of chambers in human heart is A 1 B 2 C 3 D 4. Check mark. Correct
252:41 A 1 B 2 C 3 D 4. Check mark. Correct answer. D4. Right arrow. Explanation.
252:45 answer. D4. Right arrow. Explanation. Humans have four heart chambers.
252:49 Humans have four heart chambers. 675.
252:51 675. The waste filtered by kidney is A. URA,
252:56 The waste filtered by kidney is A. URA, B. Oxygen, C. Glucose, D. DNA.
253:01 B. Oxygen, C. Glucose, D. DNA. Check mark. Correct answer. A. URA.
253:04 Check mark. Correct answer. A. URA. Right arrow. Explanation. Kidneys
253:07 Right arrow. Explanation. Kidneys excrete ura in urine.
253:10 excrete ura in urine. 676.
253:13 676. Fat digestion starts in A mouth, B
253:17 Fat digestion starts in A mouth, B stomach, C small intestine, D large
253:21 stomach, C small intestine, D large intestine.
253:23 intestine. Check mark. Correct answer. C small
253:26 Check mark. Correct answer. C small intestine right arrow explanation bile
253:29 intestine right arrow explanation bile and lipase act in small intestine.
253:33 and lipase act in small intestine. 677.
253:36 677. The blood vessel bringing blood from
253:38 The blood vessel bringing blood from body to heart is a pulmonary artery, B
253:43 body to heart is a pulmonary artery, B pulmonary vein, C wina cover, D aort.
253:48 pulmonary vein, C wina cover, D aort. Check mark correct answer. C wina cover
253:52 Check mark correct answer. C wina cover right arrow. Explanation. Wener cover
253:55 right arrow. Explanation. Wener cover brings deoxxygenated blood.
253:58 brings deoxxygenated blood. 678.
254:00 678. The tissue conducting food in plants is
254:04 The tissue conducting food in plants is A XYLM, B flim, C stometer, D guard
254:09 A XYLM, B flim, C stometer, D guard cells.
254:11 cells. Check mark correct answer. B flm right
254:14 Check mark correct answer. B flm right arrow explanation phm transports food
254:18 arrow explanation phm transports food substances.
254:20 substances. 679.
254:23 679. Glucose breakdown in absence of oxygen
254:26 Glucose breakdown in absence of oxygen is called a respiration. B. An aerobic
254:30 is called a respiration. B. An aerobic respiration. C. Transpiration. D.
254:34 respiration. C. Transpiration. D. Photosynthesis.
254:36 Photosynthesis. Check mark. Correct answer. B. An
254:39 Check mark. Correct answer. B. An aerobic respiration. Right arrow.
254:41 aerobic respiration. Right arrow. Explanation. This occurs without oxygen.
254:46 Explanation. This occurs without oxygen. 680.
254:48 680. Platelets help in a oxygen transport, B
254:52 Platelets help in a oxygen transport, B blood clotting, C immunity, Digestion.
254:58 blood clotting, C immunity, Digestion. Check mark. Correct answer B. Blood
255:00 Check mark. Correct answer B. Blood clotting. Right arrow. Explanation.
255:03 clotting. Right arrow. Explanation. Platelets plug wounds.
255:06 Platelets plug wounds. 681.
255:09 681. Plants excrete waste wire. A. Stormter.
255:12 Plants excrete waste wire. A. Stormter. B. Kidneys. C. Lungs. D. Pancreas.
255:18 B. Kidneys. C. Lungs. D. Pancreas. Check mark. Correct answer. A. Stormter.
255:21 Check mark. Correct answer. A. Stormter. Right arrow. Explanation. Gaseous wastes
255:24 Right arrow. Explanation. Gaseous wastes exit through stoometer.
255:27 exit through stoometer. 682.
255:29 682. The diaphragm separates. A brain and
255:33 The diaphragm separates. A brain and spinal cord. B lungs and liver. C. Chest
255:37 spinal cord. B lungs and liver. C. Chest cavity and abdomen. D. Kidneys and
255:40 cavity and abdomen. D. Kidneys and liver. Check mark. Correct answer. C.
255:44 liver. Check mark. Correct answer. C. Chest cavity and abdomen. Right arrow.
255:47 Chest cavity and abdomen. Right arrow. Explanation. Diaphragm is a muscle
255:50 Explanation. Diaphragm is a muscle dividing body cavities.
255:53 dividing body cavities. 683.
255:56 683. The stomach secretes A. Bile, B
255:59 The stomach secretes A. Bile, B hydrochloric acid, C oxygen, D nitrogen.
256:05 hydrochloric acid, C oxygen, D nitrogen. Check mark correct answer. B
256:07 Check mark correct answer. B hydrochloric acid. Right arrow.
256:10 hydrochloric acid. Right arrow. Explanation. HCL helps digestion in
256:13 Explanation. HCL helps digestion in stomach.
256:15 stomach. 684.
256:17 684. In respiration, energy is released from
256:21 In respiration, energy is released from A fat, B D NA, C glucose, D water.
256:28 A fat, B D NA, C glucose, D water. Check mark correct answer. C glucose.
256:31 Check mark correct answer. C glucose. Right arrow. Explanation. Glucose
256:34 Right arrow. Explanation. Glucose breakdown releases energy.
256:37 breakdown releases energy. 685.
256:40 685. Wes carry blood. A away from heart. B
256:44 Wes carry blood. A away from heart. B towards heart. C into kidneys. D into
256:48 towards heart. C into kidneys. D into stomach.
256:50 stomach. Check mark. Correct answer. B towards
256:53 Check mark. Correct answer. B towards heart. Right arrow. Explanation. Ways
256:56 heart. Right arrow. Explanation. Ways return blood to heart.
256:58 return blood to heart. 686.
257:01 686. Mucus in respiratory tract. A carries
257:05 Mucus in respiratory tract. A carries oxygen. B forms urine. C traps dust. D
257:10 oxygen. B forms urine. C traps dust. D produces hormones.
257:13 produces hormones. Check mark correct answer. C traps dust.
257:16 Check mark correct answer. C traps dust. Right arrow. Explanation. Mucus protects
257:20 Right arrow. Explanation. Mucus protects lungs from particles.
257:23 lungs from particles. 687.
257:25 687. Fatty acids are products of digestion of
257:29 Fatty acids are products of digestion of A starch, B proteins, C fats, D water.
257:35 A starch, B proteins, C fats, D water. Check mark. Correct answer. C fats.
257:38 Check mark. Correct answer. C fats. Right arrow explanation. Fats break down
257:42 Right arrow explanation. Fats break down into fatty acids.
257:45 into fatty acids. 688.
257:47 688. Blood returns from lungs wire. A.
257:51 Blood returns from lungs wire. A. Pulmonary vein. B. Pulmonary artery. C.
257:54 Pulmonary vein. B. Pulmonary artery. C. Aort. D. Hpatic vein. Check mark.
257:58 Aort. D. Hpatic vein. Check mark. Correct answer. A. Pulmonary vein. Right
258:01 Correct answer. A. Pulmonary vein. Right arrow. Explanation. Pulmonary vein
258:04 arrow. Explanation. Pulmonary vein carries oxygenrich blood.
258:07 carries oxygenrich blood. 689
258:10 689 sweat glands are part of a excretory
258:14 sweat glands are part of a excretory system, B respiratory system,
258:17 system, B respiratory system, Circulatory
258:18 Circulatory system, D nervous system.
258:22 system, D nervous system. Check mark correct answer. A excretory
258:25 Check mark correct answer. A excretory system. Right arrow explanation. Skin
258:28 system. Right arrow explanation. Skin helps excrete water and salts.
258:32 helps excrete water and salts. 690.
258:34 690. The main excretory product in humans is
258:37 The main excretory product in humans is A starch, B fatty acids, C ura, D
258:43 A starch, B fatty acids, C ura, D oxygen.
258:44 oxygen. Check mark correct answer. C ura right
258:48 Check mark correct answer. C ura right arrow explanation. URA is a waste from
258:51 arrow explanation. URA is a waste from protein metabolism.
258:54 protein metabolism. 691.
258:56 691. Plants lose water through A. Roots, B.
259:01 Plants lose water through A. Roots, B. fruits. C stoometer. D seeds.
259:05 fruits. C stoometer. D seeds. Check mark correct answer. C stoometer.
259:08 Check mark correct answer. C stoometer. Right arrow. Explanation. Water
259:11 Right arrow. Explanation. Water evaporates via transpiration.
259:15 evaporates via transpiration. 692.
259:17 692. The pigment in muscle storing oxygen as
259:21 The pigment in muscle storing oxygen as a myoglobin b melanin c chlorophyll d
259:26 a myoglobin b melanin c chlorophyll d keratin.
259:27 keratin. Check mark. Correct answer. A myoglobin
259:31 Check mark. Correct answer. A myoglobin right arrow explanation. Myoglobin
259:34 right arrow explanation. Myoglobin stores O for muscle use.
259:37 stores O for muscle use. 693.
259:39 693. Which cells carry oxygen? A. WBC's
259:44 Which cells carry oxygen? A. WBC's B. Platelets. C. RBC's
259:48 B. Platelets. C. RBC's D. Neurons.
259:50 D. Neurons. Check mark. Correct answer. C. RBC's.
259:54 Check mark. Correct answer. C. RBC's. Right arrow. Explanation. RBC's contain
259:58 Right arrow. Explanation. RBC's contain hemoglobin for oxygen.
260:01 hemoglobin for oxygen. 694
260:03 694 bile is stored in A. Kidney, B gall, C
260:09 bile is stored in A. Kidney, B gall, C heart, D lungs.
260:11 heart, D lungs. Check mark correct answer. B
260:14 Check mark correct answer. B gallbladder. Right arrow explanation.
260:17 gallbladder. Right arrow explanation. Gall bladder stores bile.
260:20 Gall bladder stores bile. 695.
260:22 695. Hemoglobin carries a carbon dioxide
260:26 Hemoglobin carries a carbon dioxide only, B oxygen only, C both O and CO, D
260:32 only, B oxygen only, C both O and CO, D glucose only.
260:34 glucose only. Check mark correct answer. C both O and
260:38 Check mark correct answer. C both O and CO. Right arrow. Explanation. Hemoglobin
260:41 CO. Right arrow. Explanation. Hemoglobin transports gases.
260:44 transports gases. 696.
260:47 696. The enzyme that digests fat is a
260:50 The enzyme that digests fat is a amalayise. B. Lipase. C. Pepsin. D.
260:55 amalayise. B. Lipase. C. Pepsin. D. Trison.
260:56 Trison. Check mark. Correct answer. B. Lipase.
260:59 Check mark. Correct answer. B. Lipase. Right arrow. Explanation. Lipase splits
261:02 Right arrow. Explanation. Lipase splits fats into fatty acids.
261:06 fats into fatty acids. 697.
261:08 697. Photosynthesis converts energy to A.
261:12 Photosynthesis converts energy to A. Light energy, B chemical energy, C
261:16 Light energy, B chemical energy, C electrical energy, D mechanical energy.
261:21 electrical energy, D mechanical energy. Check mark. Correct answer. B. Chemical
261:24 Check mark. Correct answer. B. Chemical energy. Right arrow. Explanation. Energy
261:27 energy. Right arrow. Explanation. Energy is stored as glucose.
261:30 is stored as glucose. 698.
261:32 698. The renal artery carries blood to A.
261:36 The renal artery carries blood to A. Liver. B. Kidneys. C. Heart. D. Brain.
261:41 Liver. B. Kidneys. C. Heart. D. Brain. Check mark. Correct answer. B. Kidneys.
261:44 Check mark. Correct answer. B. Kidneys. Right arrow. Explanation. Renal artery
261:48 Right arrow. Explanation. Renal artery supplies blood to kidneys.
261:51 supplies blood to kidneys. 699
261:53 699 respiration releases. A starch, B
261:57 respiration releases. A starch, B oxygen, C energy, D protein.
262:02 oxygen, C energy, D protein. Check mark correct answer. C energy.
262:05 Check mark correct answer. C energy. Right arrow. Explanation. Energy fuels
262:08 Right arrow. Explanation. Energy fuels body processes.
262:11 body processes. 700. The human excretory system includes
262:16 700. The human excretory system includes A. Stomach and liver. B. Heart and
262:19 A. Stomach and liver. B. Heart and lungs. C. Kidneys and bladder. D. Brain
262:23 lungs. C. Kidneys and bladder. D. Brain and nerves.
262:25 and nerves. Check mark. Correct answer. C. Kidneys
262:28 Check mark. Correct answer. C. Kidneys and bladder. Right arrow. Explanation.
262:30 and bladder. Right arrow. Explanation. They help eliminate waste.
262:34 They help eliminate waste. 71.
262:36 71. The pulmonary artery carries a
262:39 The pulmonary artery carries a oxygenated blood, b deoxxygenated blood,
262:43 oxygenated blood, b deoxxygenated blood, c lymph, d plasma.
262:46 c lymph, d plasma. Check mark. Correct answer B.
262:49 Check mark. Correct answer B. Deoxxygenated blood. Right arrow.
262:51 Deoxxygenated blood. Right arrow. Explanation. Pulmonary artery carries
262:54 Explanation. Pulmonary artery carries deoxxygenated blood from the heart to
262:57 deoxxygenated blood from the heart to the lungs.
262:59 the lungs. 72.
263:00 72. The waste product of protein metabolism
263:04 The waste product of protein metabolism is a starch, b ura, c glucose, d fatty
263:10 is a starch, b ura, c glucose, d fatty acids.
263:12 acids. Check mark. Correct answer. B ura. Right
263:15 Check mark. Correct answer. B ura. Right arrow. Explanation: URA is produced when
263:19 arrow. Explanation: URA is produced when proteins are broken down.
263:22 proteins are broken down. 73
263:24 73 Which process occurs in mitochondria?
263:27 Which process occurs in mitochondria? A. Photosynthesis. B. Digestion. C.
263:32 A. Photosynthesis. B. Digestion. C. Respiration. D. Filtration.
263:35 Respiration. D. Filtration. Check mark. Correct answer. C.
263:38 Check mark. Correct answer. C. Respiration. Right arrow. Explanation.
263:41 Respiration. Right arrow. Explanation. Mitochondria are the powerhouse of the
263:43 Mitochondria are the powerhouse of the cell.
263:45 cell. 74
263:47 74 gut cells regulate. A photosynthesis, B
263:51 gut cells regulate. A photosynthesis, B water absorption, C stomal opening, D
263:56 water absorption, C stomal opening, D fat storage.
263:58 fat storage. Check mark correct answer. C stomal
264:01 Check mark correct answer. C stomal opening. Right arrow explanation. Guard
264:04 opening. Right arrow explanation. Guard cells control stometer to regulate gas
264:07 cells control stometer to regulate gas exchange.
264:09 exchange. 75.
264:11 75. The smallest blood vessels are A veins,
264:15 The smallest blood vessels are A veins, B arteries, C capillaries, D lymph
264:19 B arteries, C capillaries, D lymph vessels.
264:21 vessels. Check mark. Correct answer. Capillaries.
264:24 Check mark. Correct answer. Capillaries. Right arrow. Explanation. Capillaries
264:27 Right arrow. Explanation. Capillaries connect arteries and veins for exchange
264:30 connect arteries and veins for exchange of substances.
264:32 of substances. 76.
264:34 76. The tube connecting mouth to stomach is
264:38 The tube connecting mouth to stomach is A bronchus, B trachea, C esophagus, D
264:43 A bronchus, B trachea, C esophagus, D fins. Check mark. Correct answer, C
264:46 fins. Check mark. Correct answer, C esophagus. Right arrow. Explanation.
264:49 esophagus. Right arrow. Explanation. Food passes through the esophagus to
264:52 Food passes through the esophagus to reach the stomach.
264:54 reach the stomach. 77.
264:56 77. Photosynthesis requires A. Oxygen only,
265:00 Photosynthesis requires A. Oxygen only, B. Carbon dioxide only, C. Water only,
265:05 B. Carbon dioxide only, C. Water only, D. Sunlight, water, CO.
265:09 D. Sunlight, water, CO. Check mark. Correct answer. D. Sunlight,
265:12 Check mark. Correct answer. D. Sunlight, water, CO. Right arrow. Explanation. All
265:16 water, CO. Right arrow. Explanation. All these are raw materials for
265:18 these are raw materials for photosynthesis.
265:21 photosynthesis. 78.
265:23 78. Excess glucose in blood can cause. A.
265:26 Excess glucose in blood can cause. A. Diabetes. B. Anemia. C. Hypertension. D.
265:31 Diabetes. B. Anemia. C. Hypertension. D. Jaundice.
265:33 Jaundice. Check mark. Correct answer. A. Diabetes.
265:36 Check mark. Correct answer. A. Diabetes. Right arrow. Explanation. High blood
265:39 Right arrow. Explanation. High blood sugar leads to diabetes.
265:43 sugar leads to diabetes. 79.
265:44 79. The main site of absorption of digested
265:47 The main site of absorption of digested food is a mouth. B large intestine, C
265:53 food is a mouth. B large intestine, C small intestine, D stomach.
265:56 small intestine, D stomach. Check mark. Correct answer. C. Small
265:59 Check mark. Correct answer. C. Small intestine right arrow explanation.
266:02 intestine right arrow explanation. Willie in small intestine absorb
266:05 Willie in small intestine absorb nutrients.
266:07 nutrients. 710.
266:09 710. Blood returns to the heart wire. A.
266:12 Blood returns to the heart wire. A. Arteries. B. Waines. C. Bronai. D.
266:17 Arteries. B. Waines. C. Bronai. D. Lymph.
266:18 Lymph. Check mark. Correct answer. B. Waines.
266:21 Check mark. Correct answer. B. Waines. Right arrow. Explanation. Wes carry
266:24 Right arrow. Explanation. Wes carry blood toward the heart.
266:27 blood toward the heart. 711
266:29 711 Transpiration takes place through A
266:32 Transpiration takes place through A roots, B stomter, C fruit, D stem. Check
266:38 roots, B stomter, C fruit, D stem. Check mark correct answer. B stomter right
266:41 mark correct answer. B stomter right arrow explanation. Stoometer allow water
266:44 arrow explanation. Stoometer allow water vapor to escape.
266:47 vapor to escape. 712.
266:49 712. Bile juice is stored in A. Pancreas, B.
266:53 Bile juice is stored in A. Pancreas, B. Kidney, C. Gall bladder D. Spleen.
266:58 Kidney, C. Gall bladder D. Spleen. Check mark. Correct answer. C.
267:01 Check mark. Correct answer. C. Gallbladder. Right arrow. Explanation.
267:04 Gallbladder. Right arrow. Explanation. Bile is stored and concentrated in the
267:06 Bile is stored and concentrated in the gallbladder.
267:08 gallbladder. 713.
267:10 713. The wall of alvoli is a thick and
267:14 The wall of alvoli is a thick and muscular. B single thin layer. C bony. D
267:19 muscular. B single thin layer. C bony. D glandula.
267:21 glandula. Check mark correct answer. B. Single
267:24 Check mark correct answer. B. Single thin layer. Right arrow. Explanation.
267:27 thin layer. Right arrow. Explanation. Thin walls aid gas exchange.
267:31 Thin walls aid gas exchange. 714.
267:33 714. Plants excrete waste mainly in form of A
267:37 Plants excrete waste mainly in form of A O in water vapor, B ura, C ammonia, D
267:42 O in water vapor, B ura, C ammonia, D fatty acids.
267:44 fatty acids. Check mark correct answer. A O in water
267:48 Check mark correct answer. A O in water vapor. Right arrow. Explanation. Gaseous
267:51 vapor. Right arrow. Explanation. Gaseous waste exits through stoometer.
267:55 waste exits through stoometer. 715.
267:57 715. Which enzyme digests starch? A. Lipase.
268:01 Which enzyme digests starch? A. Lipase. B. Pepsin. C. Aalayise. D. Trison.
268:06 B. Pepsin. C. Aalayise. D. Trison. Check mark. Correct answer. C. Aalayise.
268:09 Check mark. Correct answer. C. Aalayise. Right arrow. Explanation. Aalayise
268:12 Right arrow. Explanation. Aalayise breaks starch into sugars.
268:15 breaks starch into sugars. 716.
268:17 716. The human heart is located in Abdomen, B
268:22 The human heart is located in Abdomen, B neck, C thoracic cavity, D skull.
268:26 neck, C thoracic cavity, D skull. Check mark correct answer. C thoracic
268:30 Check mark correct answer. C thoracic cavity. Right arrow. Explanation. The
268:32 cavity. Right arrow. Explanation. The heart is in the chest cavity.
268:36 heart is in the chest cavity. 717.
268:38 717. The respiratory system includes A.
268:41 The respiratory system includes A. Kidneys, B. Alvoli, C. Nefrons, D.
268:46 Kidneys, B. Alvoli, C. Nefrons, D. Willie check mark correct answer B
268:50 Willie check mark correct answer B alvoli right arrow explanation alvoli a
268:53 alvoli right arrow explanation alvoli a tiny air sacks in lungs
268:57 tiny air sacks in lungs 718
268:59 718 water absorption in plants happens
269:02 water absorption in plants happens through a stems b leaves c roots d
269:07 through a stems b leaves c roots d flowers
269:09 flowers check mark correct answer c roots right
269:12 check mark correct answer c roots right arrow explanation roots draw water from
269:16 arrow explanation roots draw water from soil.
269:18 soil. 719.
269:20 719. Respiration produces A. Light energy, B
269:24 Respiration produces A. Light energy, B heat only, C carbon dioxide and energy,
269:29 heat only, C carbon dioxide and energy, D oxygen only.
269:31 D oxygen only. Check mark correct answer. C. Carbon
269:34 Check mark correct answer. C. Carbon dioxide and energy. Right arrow.
269:37 dioxide and energy. Right arrow. Explanation. Coen energy are released in
269:40 Explanation. Coen energy are released in respiration.
269:42 respiration. 720.
269:44 720. The upper chambers of heart are called A
269:48 The upper chambers of heart are called A ventricles, B bronchioles, C atriums, D
269:53 ventricles, B bronchioles, C atriums, D alvoli.
269:54 alvoli. Check mark correct answer. C atriums.
269:58 Check mark correct answer. C atriums. Right arrow. Explanation. Atria receive
270:01 Right arrow. Explanation. Atria receive blood.
270:03 blood. 721.
270:05 721. Which organ stores urine? A. Kidney. B.
270:09 Which organ stores urine? A. Kidney. B. Urita. C. Urinary bladder. D. Liver.
270:14 Urita. C. Urinary bladder. D. Liver. Check mark. Correct answer. C. Urinary
270:17 Check mark. Correct answer. C. Urinary bladder. Right arrow. Explanation.
270:20 bladder. Right arrow. Explanation. Bladder stores urine temporarily.
270:24 Bladder stores urine temporarily. 722.
270:26 722. White blood cells fight. A. Light rays.
270:30 White blood cells fight. A. Light rays. B. Disease. C. Heat. D. Sunlight.
270:35 B. Disease. C. Heat. D. Sunlight. Check mark. Correct answer. B. Disease.
270:38 Check mark. Correct answer. B. Disease. Right arrow. Explanation. WBC's protect
270:42 Right arrow. Explanation. WBC's protect the body from infections.
270:45 the body from infections. 723
270:48 723 Plants absorb minerals via A. Leaves, B.
270:52 Plants absorb minerals via A. Leaves, B. Flowers, C roots, D stems.
270:57 Flowers, C roots, D stems. Check mark. Correct answer. C. Roots.
271:00 Check mark. Correct answer. C. Roots. Right arrow. Explanation. Roots take
271:03 Right arrow. Explanation. Roots take minerals from soil.
271:05 minerals from soil. 724.
271:08 724. Gas exchange in plants happens through A
271:12 Gas exchange in plants happens through A God cells, B chlorophyll, C stoometer, D
271:17 God cells, B chlorophyll, C stoometer, D vessels check mark correct answer, C
271:21 vessels check mark correct answer, C stoometer right arrow explanation
271:23 stoometer right arrow explanation stoometer open for gas exchange.
271:27 stoometer open for gas exchange. 725.
271:30 725. Excess salt is removed by A tears, B
271:34 Excess salt is removed by A tears, B hair, C sweat, D bile.
271:38 hair, C sweat, D bile. Check mark. Correct answer. C sweat.
271:41 Check mark. Correct answer. C sweat. Right arrow. Explanation. Sweat
271:44 Right arrow. Explanation. Sweat eliminates salt and water.
271:47 eliminates salt and water. 726.
271:49 726. The green pigment in plants is A.
271:53 The green pigment in plants is A. Melanin, B. Chlorophyll, C hemoglobin, D
271:57 Melanin, B. Chlorophyll, C hemoglobin, D lignon.
271:59 lignon. Check mark. Correct answer. B.
272:01 Check mark. Correct answer. B. Chlorophyll. Right arrow. Explanation.
272:04 Chlorophyll. Right arrow. Explanation. Chlorophyll traps sunlight for
272:06 Chlorophyll traps sunlight for photosynthesis.
272:09 photosynthesis. 727.
272:12 727. Oxygen enters blood in A. Alvoli. B.
272:16 Oxygen enters blood in A. Alvoli. B. Lymph nodes. C. Heart atria. D. Kidneys.
272:22 Lymph nodes. C. Heart atria. D. Kidneys. Check mark. Correct answer. A. Alvoli.
272:25 Check mark. Correct answer. A. Alvoli. Right arrow. Explanation. Oxygen
272:27 Right arrow. Explanation. Oxygen diffuses into blood in alvoli.
272:31 diffuses into blood in alvoli. 728.
272:34 728. Food is moved along the gut by A.
272:37 Food is moved along the gut by A. Gravity, B. Air pressure, C.
272:40 Gravity, B. Air pressure, C. Paristalysis, D. Osmosis.
272:44 Paristalysis, D. Osmosis. Check mark. Correct answer. C.
272:47 Check mark. Correct answer. C. Paristalysis. Right arrow. Explanation.
272:50 Paristalysis. Right arrow. Explanation. Muscle contractions push food forward.
272:54 Muscle contractions push food forward. 729.
272:57 729. Blood vessels that carry blood away from
272:59 Blood vessels that carry blood away from heart are A. Veins, B capillaries, C
273:04 heart are A. Veins, B capillaries, C arteries, D lymph vessels.
273:08 arteries, D lymph vessels. Check mark correct answer. C arteries.
273:11 Check mark correct answer. C arteries. Right arrow. Explanation. Arteries carry
273:14 Right arrow. Explanation. Arteries carry blood under pressure.
273:17 blood under pressure. 730.
273:19 730. The functional unit of kidney is a
273:22 The functional unit of kidney is a neuron, b nephron, c alvolus, d
273:26 neuron, b nephron, c alvolus, d broncholle.
273:28 broncholle. Check mark correct answer. B nephron
273:31 Check mark correct answer. B nephron right arrow explanation. Nephrons filter
273:35 right arrow explanation. Nephrons filter waste from blood.
273:37 waste from blood. 731.
273:39 731. The main function of chlorophyll is to a
273:43 The main function of chlorophyll is to a trap sunlight. B. Absorb water. C. Store
273:48 trap sunlight. B. Absorb water. C. Store minerals. D. Produce hormones.
273:51 minerals. D. Produce hormones. Check mark. Correct answer. A. Trap
273:54 Check mark. Correct answer. A. Trap sunlight. Right arrow. Explanation.
273:57 sunlight. Right arrow. Explanation. Chlorophyll absorbs solar energy.
274:01 Chlorophyll absorbs solar energy. 732.
274:03 732. Water vapor leaves plants through. A.
274:07 Water vapor leaves plants through. A. Root hairs. B. Guard cells. C.
274:10 Root hairs. B. Guard cells. C. Stormeter. D. Flowm.
274:14 Stormeter. D. Flowm. Check mark. Correct answer. C. Stoter.
274:17 Check mark. Correct answer. C. Stoter. Right arrow. Explanation. Stoometer
274:20 Right arrow. Explanation. Stoometer release water vapor.
274:23 release water vapor. 733.
274:25 733. Willie are found in the A. Kidney. B.
274:29 Willie are found in the A. Kidney. B. Lungs. C. Small intestine. D. Liver.
274:34 Lungs. C. Small intestine. D. Liver. Check mark. Correct answer. C. Small
274:37 Check mark. Correct answer. C. Small intestine. Right arrow. Explanation.
274:40 intestine. Right arrow. Explanation. Will he help absorb nutrients?
274:44 Will he help absorb nutrients? 734.
274:46 734. The heart's lower chambers are called A.
274:50 The heart's lower chambers are called A. Alvoli, B atriums, C ventricles, D
274:55 Alvoli, B atriums, C ventricles, D willie. Check mark correct answer. C
274:59 willie. Check mark correct answer. C ventricles right arrow. Explanation.
275:02 ventricles right arrow. Explanation. Ventricles pump blood out of heart.
275:05 Ventricles pump blood out of heart. 735.
275:08 735. The main gas plants absorb from air is A
275:12 The main gas plants absorb from air is A oxygen, B carbon dioxide, C nitrogen, D
275:17 oxygen, B carbon dioxide, C nitrogen, D hydrogen.
275:19 hydrogen. Check mark correct answer. B carbon
275:22 Check mark correct answer. B carbon dioxide. Right arrow. Explanation.
275:25 dioxide. Right arrow. Explanation. Plants need CO for photosynthesis.
275:29 Plants need CO for photosynthesis. 736.
275:32 736. The enzyme pepsin digests. A. Fats. B.
275:36 The enzyme pepsin digests. A. Fats. B. Sugars. C proteins. D starch.
275:41 Sugars. C proteins. D starch. Check mark. Correct answer. C proteins.
275:44 Check mark. Correct answer. C proteins. Right arrow. Explanation. Pepsin breaks
275:47 Right arrow. Explanation. Pepsin breaks proteins into peptides.
275:51 proteins into peptides. 737.
275:53 737. URA is carried in blood to A. Liver. B.
275:58 URA is carried in blood to A. Liver. B. Kidney. C. Lungs. D brain. Check mark.
276:03 Kidney. C. Lungs. D brain. Check mark. Correct answer. B kidney. Right arrow
276:06 Correct answer. B kidney. Right arrow explanation. Kidneys excrete ura from
276:09 explanation. Kidneys excrete ura from blood.
276:11 blood. 738.
276:13 738. The human heart pumps blood to lungs
276:16 The human heart pumps blood to lungs via. A. Aort. B. Pulmonary vein. C.
276:21 via. A. Aort. B. Pulmonary vein. C. Pulmonary artery. D. Wina carava.
276:25 Pulmonary artery. D. Wina carava. Check mark. Correct answer. C. Pulmonary
276:28 Check mark. Correct answer. C. Pulmonary artery. Right arrow. Explanation.
276:31 artery. Right arrow. Explanation. Carries blood to lungs for oxygenation.
276:35 Carries blood to lungs for oxygenation. 739.
276:37 739. The main product of photosynthesis is A
276:41 The main product of photosynthesis is A protein, B glucose, C fat, D ura. Check
276:47 protein, B glucose, C fat, D ura. Check mark correct answer. B glucose. Right
276:51 mark correct answer. B glucose. Right arrow. Explanation. Plants make glucose
276:54 arrow. Explanation. Plants make glucose as food.
276:56 as food. 740.
276:58 740. Platelets help to a absorb oxygen, b
277:02 Platelets help to a absorb oxygen, b fight infections, c stop bleeding,
277:06 fight infections, c stop bleeding, digest food. Check mark correct answer.
277:11 digest food. Check mark correct answer. C stop bleeding. Right arrow
277:13 C stop bleeding. Right arrow explanation. Platelets form blood clots.
277:18 explanation. Platelets form blood clots. 741.
277:20 741. Lungs remove. A. Salt. B. Water. C.
277:25 Lungs remove. A. Salt. B. Water. C. Oxygen. D. Carbon dioxide.
277:29 Oxygen. D. Carbon dioxide. Check mark. Correct answer. D. Carbon
277:32 Check mark. Correct answer. D. Carbon dioxide. Right arrow. Explanation. Lungs
277:35 dioxide. Right arrow. Explanation. Lungs excrete CO from blood.
277:38 excrete CO from blood. 742.
277:41 742. Digestion starts in T. A. Stomach. B.
277:45 Digestion starts in T. A. Stomach. B. Small intestine. C. Mouth. D. Liver.
277:49 Small intestine. C. Mouth. D. Liver. Check mark. Correct answer. C. Mouth.
277:52 Check mark. Correct answer. C. Mouth. Right arrow. Explanation. Saliva begins
277:56 Right arrow. Explanation. Saliva begins digestion in mouth.
277:58 digestion in mouth. 743.
278:01 743. The right side of heart carries
278:04 The right side of heart carries a oxygenated blood, B deoxxygenated
278:08 a oxygenated blood, B deoxxygenated blood, C plasma only, D water only.
278:13 blood, C plasma only, D water only. Check mark correct answer. B.
278:16 Check mark correct answer. B. Deoxxygenated blood. Right arrow.
278:18 Deoxxygenated blood. Right arrow. Explanation. Right side handles
278:21 Explanation. Right side handles deoxxygenated blood.
278:24 deoxxygenated blood. 744
278:26 744 lipase digests. A proteins, B. Sugars, C
278:31 lipase digests. A proteins, B. Sugars, C fats, D minerals.
278:35 fats, D minerals. Check mark. Correct answer. C fats.
278:38 Check mark. Correct answer. C fats. Right arrow. Explanation. Lipase breaks
278:41 Right arrow. Explanation. Lipase breaks down fat molecules.
278:44 down fat molecules. 745.
278:47 745. Lungs are protected by the A. Rib cage.
278:51 Lungs are protected by the A. Rib cage. B. Skull. C. Pelvis, D. Humorous.
278:56 B. Skull. C. Pelvis, D. Humorous. Check mark. Correct answer. A. Rib cage.
278:59 Check mark. Correct answer. A. Rib cage. Right arrow. Explanation. Ribs form a
279:02 Right arrow. Explanation. Ribs form a bony cage.
279:05 bony cage. 746.
279:07 746. The pigment that gives leaves their
279:10 The pigment that gives leaves their green color is A. Hemoglobin, B keratin,
279:14 green color is A. Hemoglobin, B keratin, C chlorophyll, D. Melanin.
279:18 C chlorophyll, D. Melanin. Check mark. Correct answer. C.
279:20 Check mark. Correct answer. C. Chlorophyll. Right arrow. Explanation:
279:23 Chlorophyll. Right arrow. Explanation: Chlorophyll reflects green light.
279:27 Chlorophyll reflects green light. 747.
279:29 747. The excretory system removes A. Carbon
279:33 The excretory system removes A. Carbon dioxide only. B. Wastes and toxins. C.
279:38 dioxide only. B. Wastes and toxins. C. Hormones only. D. Vitamins only. Check
279:42 Hormones only. D. Vitamins only. Check mark. Correct answer. B. Wastes and
279:45 mark. Correct answer. B. Wastes and toxins. Right arrow. Explanation. It
279:48 toxins. Right arrow. Explanation. It eliminates unwanted substances.
279:52 eliminates unwanted substances. 748.
279:54 748. Blood carries oxygen using A white
279:58 Blood carries oxygen using A white cells, B platelets, C chlorophyll, D
280:02 cells, B platelets, C chlorophyll, D hemoglobin.
280:04 hemoglobin. Check mark correct answer D hemoglobin.
280:08 Check mark correct answer D hemoglobin. Right arrow explanation. Hemoglobin
280:11 Right arrow explanation. Hemoglobin binds oxygen.
280:13 binds oxygen. 749.
280:16 749. An aerobic respiration in humans
280:19 An aerobic respiration in humans produces
280:20 produces A. Water, B lactic acid, C oxygen, D
280:25 A. Water, B lactic acid, C oxygen, D glucose.
280:27 glucose. Check mark correct answer. B lactic
280:30 Check mark correct answer. B lactic acid. Right arrow. Explanation. Lactic
280:34 acid. Right arrow. Explanation. Lactic acid causes muscle fatigue.
280:37 acid causes muscle fatigue. 750.
280:39 750. Kidney stones form due to A. Sugar
280:43 Kidney stones form due to A. Sugar excess, B. fatty acids. C salt deposits.
280:48 excess, B. fatty acids. C salt deposits. D protein hormones.
280:51 D protein hormones. Check mark correct answer. C. Salt
280:54 Check mark correct answer. C. Salt deposits. Right arrow. Explanation.
280:56 deposits. Right arrow. Explanation. Crystals form stones in kidneys.
281:00 Crystals form stones in kidneys. 751.
281:03 751. The pigment hemoglobin is found in A
281:07 The pigment hemoglobin is found in A WBC's
281:08 WBC's B RBC's
281:10 B RBC's C plasma D platelets.
281:14 C plasma D platelets. Check mark correct answer. B RBC's right
281:18 Check mark correct answer. B RBC's right arrow. Explanation. Hemoglobin inside
281:22 arrow. Explanation. Hemoglobin inside red blood cells binds oxygen.
281:25 red blood cells binds oxygen. 752.
281:28 752. Blood enters the kidneys through A
281:31 Blood enters the kidneys through A pulmonary artery, B hpatic vein, C renal
281:36 pulmonary artery, B hpatic vein, C renal artery, D coronary artery.
281:39 artery, D coronary artery. Check mark correct answer. C renal
281:43 Check mark correct answer. C renal artery. Right arrow. Explanation. Renal
281:46 artery. Right arrow. Explanation. Renal arteries bring blood for filtration.
281:49 arteries bring blood for filtration. 753.
281:52 753. The main function of will A. Absorb
281:56 The main function of will A. Absorb light. B. Absorb nutrients. C. Pump
282:00 light. B. Absorb nutrients. C. Pump blood. D. Produce hormones.
282:03 blood. D. Produce hormones. Check mark. Correct answer. B. Absorb
282:06 Check mark. Correct answer. B. Absorb nutrients. Right arrow. Explanation.
282:09 nutrients. Right arrow. Explanation. Willy increase surface area for
282:11 Willy increase surface area for absorption in the small intestine.
282:15 absorption in the small intestine. 754.
282:18 754. The wall of the alvoli.
282:20 The wall of the alvoli. A. Multilate. B. Cartilagynous. C.
282:24 A. Multilate. B. Cartilagynous. C. Single cell thick. D muscular.
282:28 Single cell thick. D muscular. Check mark. Correct answer. C. Single
282:31 Check mark. Correct answer. C. Single cell thick. Right arrow. Explanation.
282:34 cell thick. Right arrow. Explanation. Thin walls allow easy gas exchange.
282:38 Thin walls allow easy gas exchange. 755.
282:40 755. The enzyme pepsin acts on a fat, b
282:45 The enzyme pepsin acts on a fat, b protein, c cellulose, d starch.
282:49 protein, c cellulose, d starch. Check mark. Correct answer. B protein.
282:53 Check mark. Correct answer. B protein. Right arrow. Explanation: Pepsin breaks
282:56 Right arrow. Explanation: Pepsin breaks proteins into smaller peptides.
283:00 proteins into smaller peptides. 756
283:02 756 Lymph is similar to A. Plasma, B. Red
283:07 Lymph is similar to A. Plasma, B. Red blood cells, C platelets, D bone marrow.
283:12 blood cells, C platelets, D bone marrow. Check mark. Correct answer. A plasma.
283:15 Check mark. Correct answer. A plasma. Right arrow. Explanation. Lymph is the
283:18 Right arrow. Explanation. Lymph is the fluid part of blood minus RBCs and
283:21 fluid part of blood minus RBCs and platelets.
283:23 platelets. 757.
283:26 757. Which process forms lactic acid in
283:28 Which process forms lactic acid in muscles?
283:30 muscles? A. Photosynthesis. B. Aerobic
283:33 A. Photosynthesis. B. Aerobic respiration. C. An aerobic respiration.
283:37 respiration. C. An aerobic respiration. D. Protein synthesis.
283:40 D. Protein synthesis. Check mark. Correct answer. C. An
283:42 Check mark. Correct answer. C. An aerobic respiration. Right arrow.
283:45 aerobic respiration. Right arrow. Explanation. Lack of oxygen leads to
283:48 Explanation. Lack of oxygen leads to lactic acid production.
283:51 lactic acid production. 758.
283:53 758. The pigment chlorophyll absorbs A.
283:57 The pigment chlorophyll absorbs A. Oxygen, B sunlight, C nitrogen, D iron.
284:03 Oxygen, B sunlight, C nitrogen, D iron. Check mark correct answer. B sunlight.
284:06 Check mark correct answer. B sunlight. Right arrow. Explanation. Chlorophyll
284:09 Right arrow. Explanation. Chlorophyll traps sunlight for photosynthesis.
284:12 traps sunlight for photosynthesis. 759.
284:15 759. Starch digestion starts in the A.
284:19 Starch digestion starts in the A. Stomach. B. Small intestine, C mouth, D.
284:24 Stomach. B. Small intestine, C mouth, D. Large intestine.
284:26 Large intestine. Check mark. Correct answer. C. Mouth.
284:29 Check mark. Correct answer. C. Mouth. Right arrow. Explanation. Salivary
284:32 Right arrow. Explanation. Salivary amalayise breaks down starch.
284:35 amalayise breaks down starch. 760.
284:37 760. The smallest functional unit of kidney
284:40 The smallest functional unit of kidney is A. Alvolus, B. Nephron, C. Bronchule,
284:46 is A. Alvolus, B. Nephron, C. Bronchule, D. Willis. Check mark. Correct answer.
284:49 D. Willis. Check mark. Correct answer. B. Nephron right arrow explanation.
284:52 B. Nephron right arrow explanation. Nephrons filter blood and form urine.
284:56 Nephrons filter blood and form urine. 761.
284:59 761. The human heart is enclosed in A. Plura,
285:03 The human heart is enclosed in A. Plura, B. Maninges, C. Paricardium, D.
285:06 B. Maninges, C. Paricardium, D. Paritinium.
285:08 Paritinium. Check mark. Correct answer. C.
285:11 Check mark. Correct answer. C. Paricardium. Right arrow. Explanation.
285:14 Paricardium. Right arrow. Explanation. Paricardium protects the heart.
285:17 Paricardium protects the heart. 762
285:20 762 transpiration helps in A root growth, B
285:24 transpiration helps in A root growth, B seed dispersal, C cooling plant body, D
285:29 seed dispersal, C cooling plant body, D fruit development.
285:31 fruit development. Check mark correct answer. Cooling plant
285:34 Check mark correct answer. Cooling plant body. Right arrow explanation.
285:37 body. Right arrow explanation. Evaporation lowers leaf temperature.
285:41 Evaporation lowers leaf temperature. 763.
285:43 763. The blood vessel that carries oxygenated
285:46 The blood vessel that carries oxygenated blood from lungs to heart is
285:49 blood from lungs to heart is A pulmonary artery, B aortar, C
285:53 A pulmonary artery, B aortar, C pulmonary vein, D winner cara.
285:57 pulmonary vein, D winner cara. Check mark correct answer. C pulmonary
286:00 Check mark correct answer. C pulmonary vein right arrow. Explanation pulmonary
286:03 vein right arrow. Explanation pulmonary vein carries oxygenated blood to left
286:06 vein carries oxygenated blood to left atrium.
286:08 atrium. 764.
286:11 764. The trickier leads to the A. Stomach. B.
286:15 The trickier leads to the A. Stomach. B. Lungs. C. Kidneys. D. Liver.
286:19 Lungs. C. Kidneys. D. Liver. Check mark. Correct answer. B. Lungs.
286:22 Check mark. Correct answer. B. Lungs. Right arrow. Explanation. Trickier
286:25 Right arrow. Explanation. Trickier splits into bronchi for lungs.
286:28 splits into bronchi for lungs. 765.
286:31 765. The enzyme lipase digests. A. Proteins.
286:35 The enzyme lipase digests. A. Proteins. B. Fats. C. Sugars. D. Minerals.
286:40 B. Fats. C. Sugars. D. Minerals. Check mark. Correct answer. B. Fats.
286:43 Check mark. Correct answer. B. Fats. Right arrow. Explanation. Lip splits
286:46 Right arrow. Explanation. Lip splits fats into fatty acids and glycerol.
286:50 fats into fatty acids and glycerol. 766
286:53 766 God cells are found around. A roots, B
286:58 God cells are found around. A roots, B stomter, C flowers, D fruits.
287:02 stomter, C flowers, D fruits. Check mark. Correct answer. B stomter.
287:06 Check mark. Correct answer. B stomter. Right arrow. Explanation. Gut cells
287:09 Right arrow. Explanation. Gut cells regulates stomatital opening.
287:12 regulates stomatital opening. 767.
287:15 767. Bile juice helps in A. Fat digestion, B.
287:19 Bile juice helps in A. Fat digestion, B. Protein digestion, C carbohydrate
287:23 Protein digestion, C carbohydrate digestion. D. Blood clotting. Check
287:26 digestion. D. Blood clotting. Check mark. Correct answer. A. Fat digestion.
287:29 mark. Correct answer. A. Fat digestion. Right arrow. Explanation. Bile
287:32 Right arrow. Explanation. Bile emulsifies fats for easier enzyme
287:34 emulsifies fats for easier enzyme action.
287:36 action. 768
287:39 768 excess amino acids are converted into A
287:43 excess amino acids are converted into A fatty acids b ura c starch d o oxygen
287:49 fatty acids b ura c starch d o oxygen check mark correct answer B ura right
287:53 check mark correct answer B ura right arrow explanation liver converts excess
287:56 arrow explanation liver converts excess amino acids into ura
288:00 amino acids into ura 769
288:02 769 the heart's pumping action creates
288:05 the heart's pumping action creates A. Temperature. B. Blood pressure. C.
288:09 A. Temperature. B. Blood pressure. C. Lymph flow. D. Sweating.
288:12 Lymph flow. D. Sweating. Check mark. Correct answer. B. Blood
288:15 Check mark. Correct answer. B. Blood pressure. Right arrow. Explanation.
288:18 pressure. Right arrow. Explanation. Pressure forces blood through vessels.
288:22 Pressure forces blood through vessels. 770.
288:24 770. Plants take CO mainly through. A. Flum.
288:28 Plants take CO mainly through. A. Flum. B. Guard cells. C. STmeter. D. Xylm.
288:34 B. Guard cells. C. STmeter. D. Xylm. Check mark. Correct answer C. Stoter
288:37 Check mark. Correct answer C. Stoter right arrow explanation stoometer open
288:40 right arrow explanation stoometer open to let in gases.
288:43 to let in gases. 771
288:46 771 veins contain A. Valves B. Chlorophyll C
288:51 veins contain A. Valves B. Chlorophyll C starch D. Bile.
288:54 starch D. Bile. Check mark. Correct answer. A. Valves.
288:57 Check mark. Correct answer. A. Valves. Right arrow. Explanation. Wells prevent
289:00 Right arrow. Explanation. Wells prevent backflow of blood.
289:03 backflow of blood. 772
289:05 772 lungs contain millions of A willy B
289:09 lungs contain millions of A willy B alvoli C nephrons D X zylm
289:14 alvoli C nephrons D X zylm check mark correct answer B alvoli right
289:18 check mark correct answer B alvoli right arrow explanation alvoli a tiny air
289:21 arrow explanation alvoli a tiny air sacks for gas exchange
289:24 sacks for gas exchange 773
289:27 773 plasma is th a cell wall b fluid part of
289:32 plasma is th a cell wall b fluid part of Blood, C. Heart muscle, D. Blood
289:35 Blood, C. Heart muscle, D. Blood pigment.
289:37 pigment. Check mark. Correct answer. B. Fluid
289:40 Check mark. Correct answer. B. Fluid part of blood. Right arrow. Explanation.
289:43 part of blood. Right arrow. Explanation. Plasma carries nutrients and wastes.
289:47 Plasma carries nutrients and wastes. 774.
289:50 774. Respiration converts glucose to A.
289:53 Respiration converts glucose to A. Chlorophyll, B. Energy, C. Lipids, D.
289:58 Chlorophyll, B. Energy, C. Lipids, D. Cellulose.
290:00 Cellulose. Check mark. Correct answer. B. Energy.
290:03 Check mark. Correct answer. B. Energy. Right arrow. Explanation. Respiration
290:06 Right arrow. Explanation. Respiration releases energy for cells.
290:09 releases energy for cells. 775.
290:12 775. Urine leaves the bladder wire. A.
290:15 Urine leaves the bladder wire. A. Urethra. B. Eophagus. C. Bronus. D.
290:20 Urethra. B. Eophagus. C. Bronus. D. Aort.
290:21 Aort. Check mark. Correct answer. A. Urethra.
290:25 Check mark. Correct answer. A. Urethra. Right arrow. Explanation. Urethra is the
290:28 Right arrow. Explanation. Urethra is the tube for urine expulsion.
290:31 tube for urine expulsion. 776.
290:34 776. The pigment myoglobin stores. A fat, B
290:38 The pigment myoglobin stores. A fat, B carbohydrates, C oxygen, D calcium.
290:43 carbohydrates, C oxygen, D calcium. Check mark. Correct answer. C oxygen.
290:46 Check mark. Correct answer. C oxygen. Right arrow. Explanation. Myoglobin
290:50 Right arrow. Explanation. Myoglobin holds oxygen in muscle tissue.
290:53 holds oxygen in muscle tissue. 777.
290:56 777. The left ventricle pumps blood into A
291:00 The left ventricle pumps blood into A lungs, B aort, C liver, D kidney.
291:05 lungs, B aort, C liver, D kidney. Check mark. Correct answer. B. Aort.
291:08 Check mark. Correct answer. B. Aort. Right arrow. Explanation. Aort carries
291:11 Right arrow. Explanation. Aort carries blood to the body.
291:14 blood to the body. 778.
291:16 778. The longest part of the elementary canal
291:19 The longest part of the elementary canal is A. Large intestine. B. E esophagus.
291:24 is A. Large intestine. B. E esophagus. C. Small intestine D. Rectum.
291:28 C. Small intestine D. Rectum. Check mark. Correct answer. C. Small
291:31 Check mark. Correct answer. C. Small intestine. Right arrow. Explanation.
291:34 intestine. Right arrow. Explanation. Small intestine is longest for digestion
291:37 Small intestine is longest for digestion and absorption.
291:40 and absorption. 779.
291:42 779. Enzymes are A. Hormones, B pigments,
291:46 Enzymes are A. Hormones, B pigments, Catalysts,
291:48 Catalysts, D gases.
291:50 D gases. Check mark correct answer. Catalysts.
291:54 Check mark correct answer. Catalysts. Right arrow explanation. Enzymes speed
291:57 Right arrow explanation. Enzymes speed up chemical reactions.
292:00 up chemical reactions. 780.
292:02 780. Excess water is removed through A.
292:05 Excess water is removed through A. Lungs. B. Kidneys. C. Hair. D. Nails.
292:11 Lungs. B. Kidneys. C. Hair. D. Nails. Check mark. Correct answer. B. Kidneys.
292:14 Check mark. Correct answer. B. Kidneys. Right arrow. Explanation. Kidneys
292:17 Right arrow. Explanation. Kidneys excrete excess water is urine.
292:20 excrete excess water is urine. 781.
292:23 781. Plants store extra food as a proteins,
292:27 Plants store extra food as a proteins, bna,
292:29 bna, c starch, d lipids.
292:33 c starch, d lipids. Check mark correct answer. C starch
292:36 Check mark correct answer. C starch right arrow explanation. Starch stores
292:39 right arrow explanation. Starch stores energy in plants.
292:42 energy in plants. 782.
292:45 782. Blood leaves the heart through A. Veins,
292:48 Blood leaves the heart through A. Veins, B arteries, C capillaries, D flow.
292:54 B arteries, C capillaries, D flow. Check mark. Correct answer. B. Arteries.
292:57 Check mark. Correct answer. B. Arteries. Right arrow. Explanation. Arteries carry
293:00 Right arrow. Explanation. Arteries carry blood under high pressure.
293:03 blood under high pressure. 783.
293:05 783. Platelets help in A digestion, B gas
293:10 Platelets help in A digestion, B gas exchange, C blood clotting, D muscle
293:14 exchange, C blood clotting, D muscle contraction.
293:16 contraction. Check mark correct answer. C blood
293:19 Check mark correct answer. C blood clotting. Right arrow. Explanation.
293:21 clotting. Right arrow. Explanation. Platelets seal wounds to prevent
293:23 Platelets seal wounds to prevent bleeding.
293:25 bleeding. 784.
293:28 784. The waste product of Aerobic respiration
293:31 The waste product of Aerobic respiration is A. URA B. Lactic acid, C. Oxygen, D.
293:37 is A. URA B. Lactic acid, C. Oxygen, D. Carbon dioxide.
293:40 Carbon dioxide. Check mark. Correct answer. D. Carbon
293:43 Check mark. Correct answer. D. Carbon dioxide. Right arrow. Explanation. Co is
293:46 dioxide. Right arrow. Explanation. Co is exhaled as waste.
293:49 exhaled as waste. 785.
293:51 785. Root hairs absorb. A. Oxygen only. B.
293:56 Root hairs absorb. A. Oxygen only. B. Minerals and water. C. Sugar only. D.
294:00 Minerals and water. C. Sugar only. D. Protein. Check mark. Correct answer. B.
294:03 Protein. Check mark. Correct answer. B. Minerals and water. Right arrow.
294:05 Minerals and water. Right arrow. Explanation. Roots take up water and
294:08 Explanation. Roots take up water and minerals from soil.
294:11 minerals from soil. 786.
294:13 786. The heart is made of A. Nervous tissue.
294:17 The heart is made of A. Nervous tissue. B. Smooth muscle. C. Cardiac muscle. D.
294:22 B. Smooth muscle. C. Cardiac muscle. D. Fatty tissue.
294:24 Fatty tissue. Check mark. Correct answer. C. Cardiac
294:27 Check mark. Correct answer. C. Cardiac muscle. Right arrow. Explanation.
294:30 muscle. Right arrow. Explanation. Cardiac muscle contracts continuously.
294:34 Cardiac muscle contracts continuously. 787
294:37 787 stoometer are closed. A at night, B
294:41 stoometer are closed. A at night, B during photosynthesis, C in rainy
294:44 during photosynthesis, C in rainy season, D under high humidity.
294:48 season, D under high humidity. Check mark. Correct answer. A at night.
294:51 Check mark. Correct answer. A at night. Right arrow. Explanation. Stormter close
294:54 Right arrow. Explanation. Stormter close to save water in darkness.
294:58 to save water in darkness. 788
295:00 788 photosynthesis producers. A nitrogen
295:04 photosynthesis producers. A nitrogen gas, B ura, C glucose and oxygen, D
295:09 gas, B ura, C glucose and oxygen, D fatty acids.
295:12 fatty acids. Check mark correct answer. C glucose and
295:15 Check mark correct answer. C glucose and oxygen. Right arrow explanation. Light
295:18 oxygen. Right arrow explanation. Light energy makes glucosen.
295:21 energy makes glucosen. 789.
295:24 789. The excretory organ in insect says A
295:28 The excretory organ in insect says A lungs, B malpigian tubules, C kidneys, D
295:33 lungs, B malpigian tubules, C kidneys, D liver.
295:34 liver. Check mark correct answer. B malpigian
295:38 Check mark correct answer. B malpigian tubules. Right arrow explanation. They
295:41 tubules. Right arrow explanation. They remove nitrogenous wastes.
295:44 remove nitrogenous wastes. 790.
295:46 790. Blood in arteries is mostly A
295:49 Blood in arteries is mostly A deoxxygenated, B oxygenated, C blue in
295:54 deoxxygenated, B oxygenated, C blue in color, D mixed with bile.
295:57 color, D mixed with bile. Check mark correct answer. B oxygenated.
296:01 Check mark correct answer. B oxygenated. Right arrow. Explanation except
296:03 Right arrow. Explanation except pulmonary artery. Arteries carry
296:06 pulmonary artery. Arteries carry oxygenrich blood.
296:09 oxygenrich blood. 791.
296:11 791. The human excretory system includes A
296:15 The human excretory system includes A brain, B kidneys, C stomach, D lungs.
296:21 brain, B kidneys, C stomach, D lungs. Check mark correct answer. B kidneys.
296:24 Check mark correct answer. B kidneys. Right arrow. Explanation. Kidneys filter
296:27 Right arrow. Explanation. Kidneys filter waste from blood.
296:30 waste from blood. 792.
296:32 792. Oxygen diffuses from A. Blood to alvoli.
296:37 Oxygen diffuses from A. Blood to alvoli. B. Alvoli to blood. C. Stomach to liver.
296:41 B. Alvoli to blood. C. Stomach to liver. D. Phmium to xylem.
296:44 D. Phmium to xylem. Check mark correct answer. B. Alvoli to
296:47 Check mark correct answer. B. Alvoli to blood. Right arrow. Explanation. Oxygen
296:50 blood. Right arrow. Explanation. Oxygen enters blood in alvoli.
296:54 enters blood in alvoli. 793.
296:56 793. Carbon dioxide leaves plants through. A.
297:00 Carbon dioxide leaves plants through. A. Xylm. B. Stoometer. C. Flim. D. Seeds.
297:06 Xylm. B. Stoometer. C. Flim. D. Seeds. Check mark. Correct answer. B.
297:09 Check mark. Correct answer. B. Stoometer. Right arrow. Explanation:
297:12 Stoometer. Right arrow. Explanation: Gases exit via stomatal paws.
297:16 Gases exit via stomatal paws. 794.
297:18 794. Kidneys control. A. Food absorption. B.
297:23 Kidneys control. A. Food absorption. B. Blood sugar. C. Water balance. D.
297:26 Blood sugar. C. Water balance. D. Vision.
297:28 Vision. Check mark. Correct answer. C. Water
297:31 Check mark. Correct answer. C. Water balance. Right arrow. Explanation.
297:34 balance. Right arrow. Explanation. Kidneys are just body fluids.
297:37 Kidneys are just body fluids. 795.
297:40 795. The heart pumps blood under. A vacuum,
297:44 The heart pumps blood under. A vacuum, B. Pressure. C. No force. D magnetic
297:48 B. Pressure. C. No force. D magnetic field.
297:50 field. Check mark. Correct answer. B. Pressure.
297:53 Check mark. Correct answer. B. Pressure. Right arrow. Explanation. Pressure
297:55 Right arrow. Explanation. Pressure pushes blood through vessels.
297:58 pushes blood through vessels. 796.
298:01 796. An aerobic respiration occurs. A. with
298:05 An aerobic respiration occurs. A. with oxygen. B without oxygen, C in water
298:09 oxygen. B without oxygen, C in water only, D only at night.
298:13 only, D only at night. Check mark. Correct answer. B without
298:16 Check mark. Correct answer. B without oxygen. Right arrow. Explanation.
298:18 oxygen. Right arrow. Explanation. Anerobic processes happen without O.
298:23 Anerobic processes happen without O. 797.
298:25 797. Photosynthesis converts solar energy
298:28 Photosynthesis converts solar energy into A. Electrical energy, B. Sound
298:33 into A. Electrical energy, B. Sound energy. C. Chemical energy. D. Thermal
298:37 energy. C. Chemical energy. D. Thermal energy.
298:38 energy. Check mark. Correct answer. C. Chemical
298:41 Check mark. Correct answer. C. Chemical energy. Right arrow. Explanation. Light
298:44 energy. Right arrow. Explanation. Light energy becomes stored glucose.
298:48 energy becomes stored glucose. 798.
298:51 798. The main nitrogenous waste in humans is
298:54 The main nitrogenous waste in humans is A. Carbon dioxide, B. Star starch, C
298:59 A. Carbon dioxide, B. Star starch, C ura, D oxygen.
299:02 ura, D oxygen. Check mark. Correct answer. C. URA.
299:05 Check mark. Correct answer. C. URA. Right arrow. Explanation. URA is
299:07 Right arrow. Explanation. URA is produced from protein breakdown.
299:11 produced from protein breakdown. 799.
299:14 799. Capillaries connect. A. Arteries and
299:17 Capillaries connect. A. Arteries and veins. B. Lungs and liver. C. Kidneys
299:21 veins. B. Lungs and liver. C. Kidneys and heart. D. Brain and stomach.
299:24 and heart. D. Brain and stomach. Check mark. Correct answer. A. Arteries
299:27 Check mark. Correct answer. A. Arteries and veins. Right arrow. Explanation.
299:30 and veins. Right arrow. Explanation. Capillaries link arteries to veins.
299:34 Capillaries link arteries to veins. 800 veins generally carry blood. A away
299:39 800 veins generally carry blood. A away from heart. B toward heart. C only to
299:42 from heart. B toward heart. C only to lungs. D into bones.
299:46 lungs. D into bones. Check mark. Correct answer. B toward
299:49 Check mark. Correct answer. B toward heart. Right arrow. Explanation. Veins
299:52 heart. Right arrow. Explanation. Veins return blood to the heart.
299:54 return blood to the heart. 81.
299:56 81. The main site for water reabsorption is
300:00 The main site for water reabsorption is A stomach, B large intestine, C es
300:04 A stomach, B large intestine, C es esophagus, D pancreas.
300:07 esophagus, D pancreas. Check mark correct answer B large
300:10 Check mark correct answer B large intestine. Right arrow explanation large
300:14 intestine. Right arrow explanation large intestine absorbs water from undigested
300:17 intestine absorbs water from undigested food.
300:18 food. 82
300:20 82 The functional unit of lungs is A.
300:24 The functional unit of lungs is A. Nephron B. Alvolus C. V willis D.
300:28 Nephron B. Alvolus C. V willis D. Bronchol.
300:29 Bronchol. Check mark. Correct answer. B. Alvolus.
300:33 Check mark. Correct answer. B. Alvolus. Right arrow. Explanation. Alvoli
300:36 Right arrow. Explanation. Alvoli facilitate gas exchange.
300:39 facilitate gas exchange. 83.
300:41 83. Hemoglobin binds with A. Carbon dioxide
300:45 Hemoglobin binds with A. Carbon dioxide only, B. Nitrogen, C oxygen, D ammonia.
300:50 only, B. Nitrogen, C oxygen, D ammonia. Check mark. Correct answer. C. Oxygen
300:53 Check mark. Correct answer. C. Oxygen right arrow explanation. Hemoglobin
300:56 right arrow explanation. Hemoglobin carries oxygen in the blood.
300:59 carries oxygen in the blood. 84.
301:01 84. Plants make their food using A.
301:04 Plants make their food using A. Chlorophyll. B. Stoer only. C. Guard
301:08 Chlorophyll. B. Stoer only. C. Guard cells only. D roots only. Check mark.
301:13 cells only. D roots only. Check mark. Correct answer. A. Chlorophyll. Right
301:16 Correct answer. A. Chlorophyll. Right arrow. Explanation. Chlorophyll captures
301:19 arrow. Explanation. Chlorophyll captures sunlight for photosynthesis.
301:22 sunlight for photosynthesis. 85.
301:24 85. The human circulatory system is A open,
301:28 The human circulatory system is A open, B closed, C partially open, D absent.
301:34 B closed, C partially open, D absent. Check mark. Correct answer. B closed.
301:37 Check mark. Correct answer. B closed. Right arrow. Explanation. Blood flows
301:40 Right arrow. Explanation. Blood flows through vessels in humans.
301:43 through vessels in humans. 86.
301:45 86. Excess glucose is stored as a cellulose,
301:49 Excess glucose is stored as a cellulose, B. Glycogen, C. Protein, D. Fats.
301:55 B. Glycogen, C. Protein, D. Fats. Check mark. Correct answer. B. Glycogen.
301:58 Check mark. Correct answer. B. Glycogen. Right arrow. Explanation. Liver stores
302:01 Right arrow. Explanation. Liver stores excess glucose as glycogen.
302:04 excess glucose as glycogen. 87.
302:06 87. The instrument to listen heart sounds. A
302:10 The instrument to listen heart sounds. A microscope, B barometer, C stethoscope,
302:14 microscope, B barometer, C stethoscope, D telescope.
302:17 D telescope. Check mark. Correct answer. C. Ste
302:19 Check mark. Correct answer. C. Ste stethoscope right arrow explanation.
302:22 stethoscope right arrow explanation. Doctors listen to heartbeats using a
302:25 Doctors listen to heartbeats using a stethoscope.
302:27 stethoscope. 88.
302:29 88. Carbon dioxide is carried in blood
302:32 Carbon dioxide is carried in blood mainly as A. Gas bubbles. B. Carbomino
302:36 mainly as A. Gas bubbles. B. Carbomino compounds. C. Biccarbonates. D. Oxygen.
302:41 compounds. C. Biccarbonates. D. Oxygen. Check mark. Correct answer. C.
302:44 Check mark. Correct answer. C. Bicarbonates. Right arrow. Explanation.
302:47 Bicarbonates. Right arrow. Explanation. Co- dissolves as bicarbonate icons in
302:50 Co- dissolves as bicarbonate icons in plasma.
302:51 plasma. 89.
302:53 89. Bile makes fats easier to digest by A.
302:57 Bile makes fats easier to digest by A. Cooling them, B. Emulsifying them, C
303:01 Cooling them, B. Emulsifying them, C heating them, D storing them. Check
303:05 heating them, D storing them. Check mark. Correct answer. B. Emulsifying
303:08 mark. Correct answer. B. Emulsifying them. Right arrow. Explanation. Bile
303:11 them. Right arrow. Explanation. Bile breaks fat into small droplets.
303:14 breaks fat into small droplets. 810.
303:16 810. The red pigment in blood is A. Melanin,
303:20 The red pigment in blood is A. Melanin, B chlorophyll, C hemoglobin, D albumin.
303:25 B chlorophyll, C hemoglobin, D albumin. Check mark correct answer. C hemoglobin.
303:29 Check mark correct answer. C hemoglobin. Right arrow. Explanation. Hemoglobin
303:32 Right arrow. Explanation. Hemoglobin gives blood its red color.
303:35 gives blood its red color. 811.
303:37 811. Transllocation in plants occurs through.
303:40 Transllocation in plants occurs through. A. Xylm. B. Stoometer. C. Flim. D. Guard
303:46 A. Xylm. B. Stoometer. C. Flim. D. Guard cells.
303:47 cells. Check mark. Correct answer. C. Flom.
303:51 Check mark. Correct answer. C. Flom. Right arrow. Explanation. Flom
303:53 Right arrow. Explanation. Flom transports food in plants.
303:57 transports food in plants. 812.
303:58 812. The nephron filters. A. Blood. B. Air.
304:03 The nephron filters. A. Blood. B. Air. C. Food. D. Oxygen.
304:06 C. Food. D. Oxygen. Check mark. Correct answer. A. Blood.
304:09 Check mark. Correct answer. A. Blood. Right arrow. Explanation. Nefrons filter
304:12 Right arrow. Explanation. Nefrons filter waste from blood.
304:15 waste from blood. 813.
304:17 813. Anorobic respiration produces. A ura, B.
304:22 Anorobic respiration produces. A ura, B. Alcohol in yeast, C. Oxygen gas, D
304:26 Alcohol in yeast, C. Oxygen gas, D starch.
304:28 starch. Check mark. Correct answer. B. Alcohol
304:31 Check mark. Correct answer. B. Alcohol in yeast. Right arrow. Explanation.
304:34 in yeast. Right arrow. Explanation. Yeast fermentation produces alcohol.
304:38 Yeast fermentation produces alcohol. 814.
304:40 814. The main function of platelets is A
304:44 The main function of platelets is A carry oxygen, B produce enzymes, C form
304:48 carry oxygen, B produce enzymes, C form clots, D store energy.
304:52 clots, D store energy. Check mark correct answer. C form clots.
304:55 Check mark correct answer. C form clots. Right arrow. Explanation. Platelets help
304:58 Right arrow. Explanation. Platelets help stop bleeding.
305:01 stop bleeding. 815.
305:03 815. The main excretory product of fish is A.
305:07 The main excretory product of fish is A. Ammonia, B. URA C glucose D protein.
305:12 Ammonia, B. URA C glucose D protein. Check mark. Correct answer. A. Ammonia.
305:16 Check mark. Correct answer. A. Ammonia. Right arrow. Explanation. Fish excrete
305:19 Right arrow. Explanation. Fish excrete ammonia directly into water.
305:22 ammonia directly into water. 816.
305:24 816. Guard cells contain A. Blood B.
305:28 Guard cells contain A. Blood B. Chloroplasts C enzymes only. D
305:31 Chloroplasts C enzymes only. D hemoglobin.
305:33 hemoglobin. Check mark. Correct answer. B
305:36 Check mark. Correct answer. B chloroplasts. Right arrow explanation.
305:39 chloroplasts. Right arrow explanation. God cells help in photosynthesis.
305:43 God cells help in photosynthesis. 817.
305:45 817. The heartbeat is regulated by A. Brain
305:49 The heartbeat is regulated by A. Brain only, B muscles only, C pacemaker, D
305:54 only, B muscles only, C pacemaker, D nerves in legs.
305:56 nerves in legs. Check mark. Correct answer. C.
305:59 Check mark. Correct answer. C. Pacemaker. Right arrow. Explanation. The
306:02 Pacemaker. Right arrow. Explanation. The pacemaker controls heart rhythm.
306:05 pacemaker controls heart rhythm. 818.
306:07 818. Lungs are spongy because of A rib cage,
306:12 Lungs are spongy because of A rib cage, B alvoli, C wins, D hair. Check mark.
306:17 B alvoli, C wins, D hair. Check mark. Correct answer. B alvoli. Right arrow.
306:21 Correct answer. B alvoli. Right arrow. Explanation. Alvoli give lungs their
306:24 Explanation. Alvoli give lungs their spongy texture.
306:26 spongy texture. 819.
306:28 819. Lactic acid builds up due to A. Aerobic
306:32 Lactic acid builds up due to A. Aerobic exercise. B. An aerobic respiration. C.
306:36 exercise. B. An aerobic respiration. C. Oxygen overdose. D. Blood loss.
306:40 Oxygen overdose. D. Blood loss. Check mark. Correct answer. B. An
306:43 Check mark. Correct answer. B. An aerobic respiration. Right arrow.
306:46 aerobic respiration. Right arrow. Explanation. Lack of oxygen causes
306:49 Explanation. Lack of oxygen causes lactic acid.
306:51 lactic acid. 820.
306:53 820. The upper heart chambers are called A.
306:57 The upper heart chambers are called A. Willie. B. Atrium. C. Ventricles. D.
307:01 Willie. B. Atrium. C. Ventricles. D. Bronchioles.
307:03 Bronchioles. Check mark. Correct answer. B. Atrium.
307:06 Check mark. Correct answer. B. Atrium. Right arrow. Explanation. Atria receive
307:09 Right arrow. Explanation. Atria receive blood into the heart.
307:12 blood into the heart. 821.
307:14 821. Fat digestion needs. A. Water only. B.
307:19 Fat digestion needs. A. Water only. B. Bile and lipase. C. Glucose. D. Iron.
307:23 Bile and lipase. C. Glucose. D. Iron. Check mark. Correct answer. B. Bile and
307:27 Check mark. Correct answer. B. Bile and lipase. Right arrow. Explanation. both
307:30 lipase. Right arrow. Explanation. both emulsify and break fats.
307:33 emulsify and break fats. 822
307:35 822 capillaries connect A. Arteries and
307:38 capillaries connect A. Arteries and veins, B. Bones and muscles, C. Lungs
307:42 veins, B. Bones and muscles, C. Lungs and kidneys, D neurons and skin. Check
307:47 and kidneys, D neurons and skin. Check mark. Correct answer. A. Arteries and
307:50 mark. Correct answer. A. Arteries and veins. Right arrow. Explanation.
307:52 veins. Right arrow. Explanation. Capillaries link small arteries and
307:55 Capillaries link small arteries and veins.
307:57 veins. 823.
307:59 823. The site of urine formation is A
308:03 The site of urine formation is A bladder, B nephrons, C alvoli, D liver.
308:09 bladder, B nephrons, C alvoli, D liver. Check mark correct answer. B nefrons
308:12 Check mark correct answer. B nefrons right arrow. Explanation. Nephrons
308:15 right arrow. Explanation. Nephrons filter blood to produce urine.
308:18 filter blood to produce urine. 824.
308:20 824. Red blood cells live for about A 2 days,
308:25 Red blood cells live for about A 2 days, B 10 days, C20
308:29 B 10 days, C20 days, D 1 year. Check mark correct
308:33 days, D 1 year. Check mark correct answer. C 120 days. Right arrow
308:37 answer. C 120 days. Right arrow explanation. RBC's circulate for
308:40 explanation. RBC's circulate for approximately
308:41 approximately 120 days.
308:44 120 days. 825
308:46 825 veins carry blood under a high pressure,
308:50 veins carry blood under a high pressure, B very high speed, C low pressure, D
308:55 B very high speed, C low pressure, D magnetic force.
308:57 magnetic force. Check mark. Correct answer. C low
309:00 Check mark. Correct answer. C low pressure. Right arrow. Explanation.
309:02 pressure. Right arrow. Explanation. Veins carry blood slowly at low
309:05 Veins carry blood slowly at low pressure.
309:06 pressure. 826.
309:09 826. The green pigment in plants is called A
309:13 The green pigment in plants is called A chlorophyll, B hemoglobin, C keratin, D
309:17 chlorophyll, B hemoglobin, C keratin, D melanin.
309:19 melanin. Check mark correct answer. A
309:21 Check mark correct answer. A chlorophyll. Right arrow. Explanation.
309:24 chlorophyll. Right arrow. Explanation. Chlorophyll captures sunlight.
309:27 Chlorophyll captures sunlight. 827.
309:30 827. Bronai carry air into A. Heart, B.
309:34 Bronai carry air into A. Heart, B. Lungs, C stomach, D kidneys.
309:38 Lungs, C stomach, D kidneys. Check mark. Correct answer. B. Lungs.
309:41 Check mark. Correct answer. B. Lungs. Right arrow. Explanation. Bronchi lead
309:44 Right arrow. Explanation. Bronchi lead air into lungs.
309:47 air into lungs. 828.
309:49 828. Bile is produced in A. Kidney. B. Liver.
309:54 Bile is produced in A. Kidney. B. Liver. C. Pancreas. D. Spleen.
309:58 C. Pancreas. D. Spleen. Check mark. Correct answer. B. Liver.
310:01 Check mark. Correct answer. B. Liver. Right arrow. Explanation. Liver secretes
310:04 Right arrow. Explanation. Liver secretes bile juice.
310:06 bile juice. 829
310:09 829 RBC's transport A proteins B oxygen C
310:14 RBC's transport A proteins B oxygen C enzymes D fatty acids
310:18 enzymes D fatty acids check mark correct answer B oxygen right
310:22 check mark correct answer B oxygen right arrow explanation hemoglobin carries
310:25 arrow explanation hemoglobin carries oxygen in RBCs
310:28 oxygen in RBCs 830
310:30 830 the main waste from respiration is a
310:34 the main waste from respiration is a water only B. URA. C. Carbon dioxide. D.
310:39 water only B. URA. C. Carbon dioxide. D. Fat. Check mark. Correct answer. C.
310:43 Fat. Check mark. Correct answer. C. Carbon dioxide. Right arrow.
310:46 Carbon dioxide. Right arrow. Explanation. Respiration releases CO.
310:50 Explanation. Respiration releases CO. 831.
310:52 831. The valve between atrium and ventricle
310:55 The valve between atrium and ventricle is A. Mitral valve, B pulmonary valve, C
311:00 is A. Mitral valve, B pulmonary valve, C liver valve, D renal valve.
311:04 liver valve, D renal valve. Check mark. Correct answer. A mitral
311:07 Check mark. Correct answer. A mitral valve right arrow. Explanation. Mital
311:10 valve right arrow. Explanation. Mital valve separates left atrium and
311:13 valve separates left atrium and ventricle.
311:15 ventricle. 832.
311:17 832. Plants lose water through A. Stem hairs.
311:21 Plants lose water through A. Stem hairs. B. Guard cells. C. Stoometer. D. Roots
311:26 B. Guard cells. C. Stoometer. D. Roots only. Check mark. Correct answer. C.
311:30 only. Check mark. Correct answer. C. Stoer. Right arrow. Explanation. Water
311:33 Stoer. Right arrow. Explanation. Water vapor exits via stoometer.
311:36 vapor exits via stoometer. 833.
311:39 833. The universal solvent is A. Oil, B.
311:43 The universal solvent is A. Oil, B. Alcohol, C water, D gasoline.
311:48 Alcohol, C water, D gasoline. Check mark. Correct answer. C water.
311:51 Check mark. Correct answer. C water. Right arrow. Explanation. Water
311:53 Right arrow. Explanation. Water dissolves many substances.
311:57 dissolves many substances. 834.
311:59 834. Lymph transports. A. Iron. B. Fat
312:03 Lymph transports. A. Iron. B. Fat molecules. C. Oxygen only. D. Nerves.
312:09 molecules. C. Oxygen only. D. Nerves. Check mark. Correct answer. B. Fat
312:12 Check mark. Correct answer. B. Fat molecules. Right arrow. Explanation.
312:14 molecules. Right arrow. Explanation. Lymph carries fats from intestines.
312:18 Lymph carries fats from intestines. 835.
312:21 835. The breathing center is in a heart, b
312:25 The breathing center is in a heart, b liver, c brain, d kidney.
312:29 liver, c brain, d kidney. Check mark. Correct answer C. Brain
312:32 Check mark. Correct answer C. Brain right arrow explanation. Brain controls
312:36 right arrow explanation. Brain controls breathing rhythm.
312:38 breathing rhythm. 836.
312:41 836. Smallest blood vessels are A. Arteries,
312:44 Smallest blood vessels are A. Arteries, B. Vains, C. Capillaries, D bronchi.
312:50 B. Vains, C. Capillaries, D bronchi. Check mark. Correct answer. C.
312:52 Check mark. Correct answer. C. Capillaries. Right arrow. Explanation.
312:55 Capillaries. Right arrow. Explanation. Capillaries exchange gases and
312:57 Capillaries exchange gases and nutrients.
312:59 nutrients. 837
313:02 837 photosynthesis uses. A nitrogen gas, B.
313:07 photosynthesis uses. A nitrogen gas, B. Sunlight, C hemoglobin, D. Myoglobin.
313:12 Sunlight, C hemoglobin, D. Myoglobin. Check mark. Correct answer. B. Sunlight.
313:15 Check mark. Correct answer. B. Sunlight. Right arrow. Explanation. Sunlight
313:18 Right arrow. Explanation. Sunlight powers photosynthesis.
313:21 powers photosynthesis. 838.
313:24 838. The valve at the stomach entrance is A
313:27 The valve at the stomach entrance is A bicuspid valve, B pylorax sphincter, C
313:31 bicuspid valve, B pylorax sphincter, C cardiac sphincter, D aortic valve.
313:36 cardiac sphincter, D aortic valve. Check mark correct answer. Cardiac
313:39 Check mark correct answer. Cardiac sphincter. Right arrow explanation.
313:41 sphincter. Right arrow explanation. Cardiac sphincter prevents food reflux.
313:46 Cardiac sphincter prevents food reflux. 839.
313:48 839. Saliva helps to A clot blood, B absorb
313:53 Saliva helps to A clot blood, B absorb water, C digest starch, D pump blood.
313:57 water, C digest starch, D pump blood. Check mark. Correct answer. C digest
314:00 Check mark. Correct answer. C digest starch. Right arrow. Explanation.
314:03 starch. Right arrow. Explanation. Aalayise in saliva break starch.
314:07 Aalayise in saliva break starch. 840.
314:09 840. The human heart has A two chambers, B
314:13 The human heart has A two chambers, B three chambers, C four chambers, D five
314:18 three chambers, C four chambers, D five chambers.
314:20 chambers. Check mark. Correct answer. C four
314:23 Check mark. Correct answer. C four chambers. Right arrow. Explanation. Two
314:26 chambers. Right arrow. Explanation. Two atria and two ventricles.
314:29 atria and two ventricles. 841.
314:31 841. The liver also stores a starch, B. Bile,
314:36 The liver also stores a starch, B. Bile, C, fatty acids, D. Nerves.
314:40 C, fatty acids, D. Nerves. Check mark. Correct answer. B. Bile.
314:43 Check mark. Correct answer. B. Bile. Right arrow. Explanation. Liver produces
314:47 Right arrow. Explanation. Liver produces and stores bile.
314:49 and stores bile. 842.
314:51 842. White blood cells fight. A. Sunlight. B.
314:55 White blood cells fight. A. Sunlight. B. Bacteria. C. Vitamins. D. Oxygen.
315:00 Bacteria. C. Vitamins. D. Oxygen. Check mark. Correct answer. B. Bacteria.
315:04 Check mark. Correct answer. B. Bacteria. Right arrow. Explanation: WBC's protect
315:07 Right arrow. Explanation: WBC's protect against infections.
315:10 against infections. 843
315:13 843 The largest artery is A. Wiener cover,
315:17 The largest artery is A. Wiener cover, B. Pulmonary artery, C aort, D. Hpatic
315:21 B. Pulmonary artery, C aort, D. Hpatic vein. Check mark. Correct answer. C.
315:25 vein. Check mark. Correct answer. C. Aort right arrow. Explanation. Aort
315:28 Aort right arrow. Explanation. Aort carries blood to the body.
315:31 carries blood to the body. 844.
315:34 844. Oxygen is essential for A protein
315:37 Oxygen is essential for A protein digestion, B respiration, C lipod
315:42 digestion, B respiration, C lipod storage, DNA copying.
315:45 storage, DNA copying. Check mark correct answer. B
315:48 Check mark correct answer. B respiration. Right arrow explanation.
315:51 respiration. Right arrow explanation. Cells need oxygen to produce energy.
315:55 Cells need oxygen to produce energy. 845.
315:57 845. The trickier is also called A. Wind
316:01 The trickier is also called A. Wind pipe, B. Food pipe, C. Blood vessel, D.
316:05 pipe, B. Food pipe, C. Blood vessel, D. Kidney duct. Check mark. Correct answer.
316:10 Kidney duct. Check mark. Correct answer. A. Windpipe. Right arrow. Explanation.
316:13 A. Windpipe. Right arrow. Explanation. Trickier. Is the air passage to lungs.
316:17 Trickier. Is the air passage to lungs. 846.
316:19 846. Excretary organs remove. A. Food. B.
316:24 Excretary organs remove. A. Food. B. Wastes. C. Vitamins only. D. Energy.
316:29 Wastes. C. Vitamins only. D. Energy. Check mark. Correct answer B. Wastes
316:32 Check mark. Correct answer B. Wastes right arrow explanation. Excretion
316:35 right arrow explanation. Excretion removes waste from body.
316:38 removes waste from body. 847.
316:40 847. The outer layer of kidney is A. Cortex
316:44 The outer layer of kidney is A. Cortex B. Mela C. Capsule D. Nefron.
316:50 B. Mela C. Capsule D. Nefron. Check mark. Correct answer. A. Cortex.
316:53 Check mark. Correct answer. A. Cortex. Right arrow. Explanation. Cortex
316:55 Right arrow. Explanation. Cortex surrounds the kidney interior.
316:58 surrounds the kidney interior. 848
317:01 848 URA is formed in A heart, B liver, C
317:06 URA is formed in A heart, B liver, C kidney, D stomach.
317:09 kidney, D stomach. Check mark correct answer. B liver right
317:12 Check mark correct answer. B liver right arrow explanation. Liver converts
317:15 arrow explanation. Liver converts ammonia into ura.
317:18 ammonia into ura. 849.
317:20 849. The pulmonary vein carries a
317:23 The pulmonary vein carries a deoxxygenated blood, B oxygenated blood,
317:27 deoxxygenated blood, B oxygenated blood, C plasma only, D bile.
317:31 C plasma only, D bile. Check mark. Correct answer. B.
317:34 Check mark. Correct answer. B. Oxygenated blood. Right arrow.
317:36 Oxygenated blood. Right arrow. Explanation. Pulmonary vein brings
317:39 Explanation. Pulmonary vein brings oxygenated blood to heart.
317:42 oxygenated blood to heart. 850.
317:44 850. The term respiration means A. Sweating,
317:48 The term respiration means A. Sweating, B. digestion, C breathing and energy
317:51 B. digestion, C breathing and energy release, D. Hair growth.
317:54 release, D. Hair growth. Check mark correct answer. C breathing
317:58 Check mark correct answer. C breathing and energy release. Right arrow
318:00 and energy release. Right arrow explanation. Respiration involves gas
318:03 explanation. Respiration involves gas exchange and ATP production.
318:06 exchange and ATP production. 851.
318:09 851. The smallest artery branches are called
318:12 The smallest artery branches are called A veins, B capillaries, C arterles, D
318:17 A veins, B capillaries, C arterles, D alvoli.
318:19 alvoli. Check mark correct answer. C arterose
318:22 Check mark correct answer. C arterose right arrow. Explanation. Arteros branch
318:26 right arrow. Explanation. Arteros branch off from arteries and lead to
318:27 off from arteries and lead to capillaries.
318:29 capillaries. 852.
318:32 852. The contraction phase of heart is called
318:35 The contraction phase of heart is called A. Cy, B. Diastily, C. Respiration, D.
318:41 A. Cy, B. Diastily, C. Respiration, D. Digestion.
318:43 Digestion. Check mark. Correct answer. A. Cy. Right
318:46 Check mark. Correct answer. A. Cy. Right arrow. Explanation. Cy pumps blood out
318:50 arrow. Explanation. Cy pumps blood out of the heart chambers?
318:52 of the heart chambers? 853.
318:55 853. Which enzyme digests proteins in the
318:58 Which enzyme digests proteins in the stomach? A. Ama. B. Pepsin. C. Lipase.
319:03 stomach? A. Ama. B. Pepsin. C. Lipase. D. Trison.
319:05 D. Trison. Check mark. Correct answer. B. Pepsin.
319:08 Check mark. Correct answer. B. Pepsin. Right arrow. Explanation. Pepsin breaks
319:11 Right arrow. Explanation. Pepsin breaks proteins into peptides in the stomach.
319:15 proteins into peptides in the stomach. 854.
319:18 854. Lymph flows in. A pulses. B. Waines
319:22 Lymph flows in. A pulses. B. Waines only. C. One direction. D. Both
319:26 only. C. One direction. D. Both directions.
319:27 directions. Check mark. Correct answer. C. One
319:30 Check mark. Correct answer. C. One direction. Right arrow. Explanation.
319:33 direction. Right arrow. Explanation. Wells ensure lymph flows toward the
319:36 Wells ensure lymph flows toward the heart.
319:37 heart. 855.
319:40 855. Plants produce oxygen during A.
319:43 Plants produce oxygen during A. Digestion, B respiration. C
319:47 Digestion, B respiration. C photosynthesis, D growth only. Check
319:51 photosynthesis, D growth only. Check mark. Correct answer. C. Photosynthesis.
319:54 mark. Correct answer. C. Photosynthesis. Right arrow. Explanation. Oxygen is a
319:57 Right arrow. Explanation. Oxygen is a byproduct of photosynthesis.
320:01 byproduct of photosynthesis. 856.
320:03 856. The tissue transporting water in plants
320:06 The tissue transporting water in plants is A. PHM, B guard cells, C XYM, D
320:12 is A. PHM, B guard cells, C XYM, D meifil.
320:14 meifil. Check mark correct answer. C XYLM. Right
320:18 Check mark correct answer. C XYLM. Right arrow. Explanation. Xyle carries water
320:21 arrow. Explanation. Xyle carries water and minerals upward.
320:24 and minerals upward. 857.
320:26 857. Which fluid prevents lungs from
320:28 Which fluid prevents lungs from collapsing? A plasma B sinovial fluid C
320:34 collapsing? A plasma B sinovial fluid C surfactant D mucus check mark correct
320:37 surfactant D mucus check mark correct answer C surfactant Right arrow
320:41 answer C surfactant Right arrow explanation surfactant reduces surface
320:44 explanation surfactant reduces surface tension in alvoli
320:47 tension in alvoli 858
320:49 858 oxygenated blood is bright A yellow B
320:53 oxygenated blood is bright A yellow B blue C red D green
320:57 blue C red D green check mark correct Answer C. Red right
321:01 check mark correct Answer C. Red right arrow. Explanation. Oxygenerrich blood
321:04 arrow. Explanation. Oxygenerrich blood appears bright red.
321:07 appears bright red. 859.
321:09 859. The valve between right atrium and
321:12 The valve between right atrium and ventricle is A. Bicasper valve. B.
321:16 ventricle is A. Bicasper valve. B. Tricirusped valve. C. Pulmonary valve.
321:19 Tricirusped valve. C. Pulmonary valve. D. Mitral valve. Check mark. Correct
321:23 D. Mitral valve. Check mark. Correct answer. B. Triricuspid valve. Right
321:26 answer. B. Triricuspid valve. Right arrow. Explanation. Tricuspid valve
321:29 arrow. Explanation. Tricuspid valve prevents back flow into right atrium.
321:33 prevents back flow into right atrium. 860.
321:35 860. Excrettory system of humans includes A.
321:39 Excrettory system of humans includes A. Brain and spinal cord, B. Kidneys and
321:43 Brain and spinal cord, B. Kidneys and uritus, C. Lungs only, D. Heart and
321:47 uritus, C. Lungs only, D. Heart and liver. Check mark. Correct answer. B.
321:51 liver. Check mark. Correct answer. B. Kidneys and uritus. Right arrow.
321:53 Kidneys and uritus. Right arrow. Explanation. The excretory system
321:56 Explanation. The excretory system filters blood and removes urine.
321:59 filters blood and removes urine. 861.
322:02 861. The opening of windpipe is protected by
322:05 The opening of windpipe is protected by A. Epiglotus, B. Liver, C. Diaphragm, D.
322:10 A. Epiglotus, B. Liver, C. Diaphragm, D. AOT.
322:12 AOT. Check mark. Correct answer. A.
322:14 Check mark. Correct answer. A. Epiglotus. Right arrow. Explanation.
322:17 Epiglotus. Right arrow. Explanation. Epiglotus prevents food entering
322:19 Epiglotus prevents food entering windpipe.
322:21 windpipe. 862.
322:24 862. Food pipe is also known as A larynx, B
322:29 Food pipe is also known as A larynx, B fins, C esophagus, D bronus.
322:33 fins, C esophagus, D bronus. Check mark correct answer. C esophagus.
322:37 Check mark correct answer. C esophagus. Right arrow. Explanation. Esophagus
322:40 Right arrow. Explanation. Esophagus carries food to the stomach.
322:43 carries food to the stomach. 863.
322:45 863. The beating of heart creates a nerve
322:49 The beating of heart creates a nerve signals. B. Blood pressure. C. Lung
322:53 signals. B. Blood pressure. C. Lung volume. D. Bone density.
322:56 volume. D. Bone density. Check mark. Correct answer. B. Blood
322:59 Check mark. Correct answer. B. Blood pressure. Right arrow. Explanation.
323:02 pressure. Right arrow. Explanation. Heart contractions produce blood
323:04 Heart contractions produce blood pressure.
323:06 pressure. 864.
323:08 864. The main pigment for photosynthesis is a
323:12 The main pigment for photosynthesis is a melanin, b chlorophyll, c hemoglobin, d
323:17 melanin, b chlorophyll, c hemoglobin, d keratin.
323:18 keratin. Check mark. Correct answer. B
323:21 Check mark. Correct answer. B chlorophyll. Right arrow explanation.
323:24 chlorophyll. Right arrow explanation. Chlorophyll absorbs light for making
323:26 Chlorophyll absorbs light for making food.
323:28 food. 865.
323:30 865. The pancreas secretes A. Insulin and
323:34 The pancreas secretes A. Insulin and enzymes, B. Oxygen, C. Plasma, D.
323:38 enzymes, B. Oxygen, C. Plasma, D. Chlorophyll.
323:40 Chlorophyll. Check mark. Correct answer. A. Insulin
323:43 Check mark. Correct answer. A. Insulin and enzymes. Right arrow. Explanation.
323:46 and enzymes. Right arrow. Explanation. Pancreas controls blood sugar and
323:49 Pancreas controls blood sugar and digestion.
323:50 digestion. 866.
323:53 866. Small intestine absorbs nutrients
323:56 Small intestine absorbs nutrients through A. Alvoli, B nephrons, C willie,
324:01 through A. Alvoli, B nephrons, C willie, D platelets.
324:04 D platelets. Check mark. Correct answer. C Willie
324:07 Check mark. Correct answer. C Willie right arrow. Explanation. Willie
324:10 right arrow. Explanation. Willie increase surface for absorption.
324:13 increase surface for absorption. 867.
324:15 867. Which of these has a double circulation
324:18 Which of these has a double circulation system? A. Fish. B. Frog. C. Human. D.
324:23 system? A. Fish. B. Frog. C. Human. D. Hydra.
324:25 Hydra. Check mark. Correct answer. C. Human.
324:28 Check mark. Correct answer. C. Human. Right arrow. Explanation. Blood passes
324:31 Right arrow. Explanation. Blood passes twice through heart in humans.
324:34 twice through heart in humans. 868.
324:37 868. The kidneys filter about how many lers
324:40 The kidneys filter about how many lers of blood daily? A. 2 to 3 L. B. 10 to 12
324:45 of blood daily? A. 2 to 3 L. B. 10 to 12 L. C.
324:48 L. C. 180 L. D. One liter.
324:51 180 L. D. One liter. Check mark. Correct answer. C.
324:55 Check mark. Correct answer. C. 180 L. Right arrow. Explanation. Kidneys
324:58 180 L. Right arrow. Explanation. Kidneys filter approximately
325:00 filter approximately 180 L per day. 869.
325:06 180 L per day. 869. Transpiration occurs mainly through A
325:09 Transpiration occurs mainly through A roots, B God cells, C stoometer, D
325:14 roots, B God cells, C stoometer, D xyllem.
325:15 xyllem. Check mark. Correct answer. C stoometer.
325:19 Check mark. Correct answer. C stoometer. Right arrow explanation. Water vapor
325:22 Right arrow explanation. Water vapor exits via stoometer.
325:25 exits via stoometer. 870.
325:27 870. The enzyme lipase breaks down. A.
325:30 The enzyme lipase breaks down. A. Sugars. B. Proteins. C. Fats. D. Water.
325:36 Sugars. B. Proteins. C. Fats. D. Water. Check mark. Correct answer. C. Fats.
325:39 Check mark. Correct answer. C. Fats. Right arrow. Explanation. Lip splits
325:42 Right arrow. Explanation. Lip splits fats into fatty acids.
325:46 fats into fatty acids. 871.
325:48 871. Lungs are located in Adominal cavity, B
325:53 Lungs are located in Adominal cavity, B brain cavity, C thoracic cavity, D
325:57 brain cavity, C thoracic cavity, D pelvic cavity.
326:00 pelvic cavity. Check mark correct answer C thoracic
326:03 Check mark correct answer C thoracic cavity. Right arrow explanation. Lungs
326:06 cavity. Right arrow explanation. Lungs lie in the chest cavity.
326:09 lie in the chest cavity. 872.
326:11 872. Which transports absorbed food in
326:14 Which transports absorbed food in plants? A xylem B phem C stoometer D
326:20 plants? A xylem B phem C stoometer D epidermis
326:22 epidermis check mark correct answer B flim right
326:25 check mark correct answer B flim right arrow explanation phm carries food to
326:29 arrow explanation phm carries food to all parts
326:31 all parts 873
326:34 873 bile is stored in the A liver B kidney C
326:39 bile is stored in the A liver B kidney C gall bladder D spleen
326:42 gall bladder D spleen check mark correct answer
326:45 check mark correct answer gallbladder right arrow explanation
326:48 gallbladder right arrow explanation gallbladder stores bile from liver
326:52 gallbladder stores bile from liver 874
326:54 874 The main function of hemoglobin is A
326:58 The main function of hemoglobin is A store sugar B digest fats C carry oxygen
327:03 store sugar B digest fats C carry oxygen D absorb sunlight
327:06 D absorb sunlight check mark correct answer C carry oxygen
327:10 check mark correct answer C carry oxygen right arrow explanation hemoglobin binds
327:13 right arrow explanation hemoglobin binds oxygen in blood.
327:16 oxygen in blood. 875.
327:19 875. Human heart valves prevent A. Digestion,
327:23 Human heart valves prevent A. Digestion, B mixing of gases, C back flow of blood,
327:27 B mixing of gases, C back flow of blood, D production of hormones.
327:30 D production of hormones. Check mark correct answer. C back flow
327:33 Check mark correct answer. C back flow of blood. Right arrow. Explanation.
327:36 of blood. Right arrow. Explanation. Valves maintain oneway blood flow.
327:40 Valves maintain oneway blood flow. 876.
327:43 876. An aerobic respiration in yeast forms. A
327:47 An aerobic respiration in yeast forms. A fat, B ethanol. C D N A D carbon
327:52 fat, B ethanol. C D N A D carbon monoxide.
327:54 monoxide. Check mark correct answer. B ethanol.
327:57 Check mark correct answer. B ethanol. Right arrow. Explanation. Alcoholic
328:00 Right arrow. Explanation. Alcoholic fermentation produces ethanol.
328:04 fermentation produces ethanol. 877.
328:07 877. Root hair cells absorb. A. Carbon
328:10 Root hair cells absorb. A. Carbon dioxide. B. Sunlight. C. Water and
328:14 dioxide. B. Sunlight. C. Water and minerals. D. Fatty acids.
328:18 minerals. D. Fatty acids. Check mark. Correct answer. C. Water and
328:21 Check mark. Correct answer. C. Water and minerals. Right arrow. Explanation.
328:24 minerals. Right arrow. Explanation. Roots take up nutrients from soil.
328:27 Roots take up nutrients from soil. 878.
328:30 878. URA is removed from blood by A. Liver,
328:34 URA is removed from blood by A. Liver, B. Heart, C. Kidneys, D lungs.
328:39 B. Heart, C. Kidneys, D lungs. Check mark. Correct answer. C. Kidneys.
328:42 Check mark. Correct answer. C. Kidneys. Right arrow. Explanation. Kidneys filter
328:45 Right arrow. Explanation. Kidneys filter ura into urine.
328:48 ura into urine. 879.
328:51 879. Photosynthesis mainly occurs in A.
328:54 Photosynthesis mainly occurs in A. Roots. B. Stem bark. C. Leaves. D.
328:59 Roots. B. Stem bark. C. Leaves. D. Flowers.
329:00 Flowers. Check mark. Correct answer. C. Leaves.
329:04 Check mark. Correct answer. C. Leaves. Right arrow. Explanation. Leaves contain
329:07 Right arrow. Explanation. Leaves contain chloroplasts.
329:09 chloroplasts. 880
329:11 880 Blood returns to the heart wire. A
329:14 Blood returns to the heart wire. A arteries, B capillaries, C veins, D
329:19 arteries, B capillaries, C veins, D nerves.
329:20 nerves. Check mark. Correct answer. C. Waines.
329:24 Check mark. Correct answer. C. Waines. Right arrow. Explanation. Wes bring
329:27 Right arrow. Explanation. Wes bring blood back to heart.
329:29 blood back to heart. 881.
329:32 881. Which produces digestive enzymes? A.
329:35 Which produces digestive enzymes? A. Brain. B. Lungs. C. Pancreas D. Kidneys.
329:41 Brain. B. Lungs. C. Pancreas D. Kidneys. Check mark. Correct answer. C. Pancreas.
329:45 Check mark. Correct answer. C. Pancreas. Right arrow. Explanation. Pancreas
329:47 Right arrow. Explanation. Pancreas secretes digestive juices.
329:51 secretes digestive juices. 882.
329:53 882. Blood without cells is called A. Plasma,
329:57 Blood without cells is called A. Plasma, B. Serum, C. Water, D. Bile. Check mark.
330:02 B. Serum, C. Water, D. Bile. Check mark. Correct answer. A. Plasma. Right arrow.
330:06 Correct answer. A. Plasma. Right arrow. Explanation. Plasma is liquid blood
330:08 Explanation. Plasma is liquid blood minus cells.
330:11 minus cells. 883
330:13 883 Lymph transports fat to A. Brain, B
330:17 Lymph transports fat to A. Brain, B stomach, C bloodstream, D kidneys.
330:22 stomach, C bloodstream, D kidneys. Check mark correct answer. C
330:25 Check mark correct answer. C bloodstream. Right arrow explanation.
330:28 bloodstream. Right arrow explanation. Lymph carries fats to blood.
330:31 Lymph carries fats to blood. 884.
330:33 884. The main nitrogenous waste in humans. A
330:38 The main nitrogenous waste in humans. A ura, B glucose, C D N A D starch.
330:44 ura, B glucose, C D N A D starch. Check mark. Correct answer. A ura. Right
330:48 Check mark. Correct answer. A ura. Right arrow. Explanation. URA is excreted in
330:51 arrow. Explanation. URA is excreted in urine.
330:53 urine. 885.
330:55 885. Lungs remove. A. Water only. B. Nitrogen
331:00 Lungs remove. A. Water only. B. Nitrogen only. C CO in water vapor. DNA.
331:06 only. C CO in water vapor. DNA. Check mark. Correct answer. C in water
331:10 Check mark. Correct answer. C in water vapor. Right arrow. Explanation. Lungs
331:13 vapor. Right arrow. Explanation. Lungs expel gases.
331:15 expel gases. 886.
331:18 886. Platelets help in a breathing, b blood
331:22 Platelets help in a breathing, b blood clotting, c producing hormones,
331:25 clotting, c producing hormones, digestion.
331:27 digestion. Check mark correct answer. B. Blood
331:30 Check mark correct answer. B. Blood clotting. Right arrow. Explanation.
331:33 clotting. Right arrow. Explanation. Platelets form clots at injuries.
331:37 Platelets form clots at injuries. 887.
331:39 887. Nefrons lie in A. Lungs. B. Kidneys. C.
331:44 Nefrons lie in A. Lungs. B. Kidneys. C. Liver. D. Brain. Check mark. Correct
331:48 Liver. D. Brain. Check mark. Correct answer. B. Kidneys. Right arrow.
331:51 answer. B. Kidneys. Right arrow. Explanation. Nefrons filter waste in
331:54 Explanation. Nefrons filter waste in kidneys.
331:56 kidneys. 888.
331:59 888. Human respiration involves A gills, B
332:03 Human respiration involves A gills, B spirals, C lungs, D chloroplasts.
332:08 spirals, C lungs, D chloroplasts. Check mark. Correct answer. C lungs.
332:11 Check mark. Correct answer. C lungs. Right arrow. Explanation. Humans breathe
332:15 Right arrow. Explanation. Humans breathe using lungs.
332:17 using lungs. 889.
332:20 889. Stormter regulate. A. Blood flow. B.
332:24 Stormter regulate. A. Blood flow. B. Water loss. C. Bone growth. D. Enzyme
332:28 Water loss. C. Bone growth. D. Enzyme action.
332:29 action. Check mark. Correct answer. B. Water
332:32 Check mark. Correct answer. B. Water loss. Right arrow. Explanation.
332:35 loss. Right arrow. Explanation. Stoometer open or close to control water
332:38 Stoometer open or close to control water vapor loss.
332:40 vapor loss. 890.
332:42 890. RBC lac. A. Hemoglobin. B. Nucleus. C.
332:48 RBC lac. A. Hemoglobin. B. Nucleus. C. Plasma. D. Oxygen.
332:51 Plasma. D. Oxygen. Check mark. Correct answer. B. Nucleus.
332:54 Check mark. Correct answer. B. Nucleus. Right arrow. Explanation. Mature RBC's
332:58 Right arrow. Explanation. Mature RBC's have no nucleus.
333:00 have no nucleus. 891
333:03 891 Pulmonary artery carries A. Oxygenated
333:07 Pulmonary artery carries A. Oxygenated blood, B deoxxygenated blood, C plasma
333:11 blood, B deoxxygenated blood, C plasma only, D platelets only. Check mark
333:15 only, D platelets only. Check mark correct answer. B. Deoxxygenated blood.
333:19 correct answer. B. Deoxxygenated blood. Right arrow. Explanation. Pulmonary
333:21 Right arrow. Explanation. Pulmonary artery brings deoxxygenated blood to
333:24 artery brings deoxxygenated blood to lungs.
333:26 lungs. 892.
333:28 892. Exhalation expels. A. Oxygen. B.
333:32 Exhalation expels. A. Oxygen. B. Hydrogen. C. Carbon dioxide. D.
333:36 Hydrogen. C. Carbon dioxide. D. Nitrogen.
333:38 Nitrogen. Check mark. Correct answer. C. Carbon
333:41 Check mark. Correct answer. C. Carbon dioxide. Right arrow. Explanation.
333:44 dioxide. Right arrow. Explanation. Exhalation removes CO from the body.
333:48 Exhalation removes CO from the body. 893.
333:50 893. Blood's liquid part is a plasma, b
333:54 Blood's liquid part is a plasma, b chlorophyll, c starch, d hair.
333:59 chlorophyll, c starch, d hair. Check mark correct answer. A plasma
334:02 Check mark correct answer. A plasma right arrow explanation. Plasma carries
334:05 right arrow explanation. Plasma carries nutrients and wastes.
334:08 nutrients and wastes. 894.
334:11 894. Respiration converts glucose into A
334:14 Respiration converts glucose into A vitamins, B, D, N, A, C energy, D fat.
334:21 vitamins, B, D, N, A, C energy, D fat. Check mark correct answer. C energy.
334:24 Check mark correct answer. C energy. Right arrow. Explanation. Glucose
334:27 Right arrow. Explanation. Glucose releases energy in cells.
334:30 releases energy in cells. 895.
334:32 895. Heartbeat sound comes from A. Air
334:36 Heartbeat sound comes from A. Air moving, B. Valve closing. C. Enzymes
334:40 moving, B. Valve closing. C. Enzymes acting. D. DNA copying.
334:43 acting. D. DNA copying. Check mark. Correct answer. B. Valve
334:46 Check mark. Correct answer. B. Valve closing. Right arrow. Explanation. Loved
334:49 closing. Right arrow. Explanation. Loved dub. Sounds are valve actions.
334:53 dub. Sounds are valve actions. 896.
334:56 896. Malpigian tubules are found in a fish,
335:00 Malpigian tubules are found in a fish, birds, c insects, d humans.
335:05 birds, c insects, d humans. Check mark. Correct answer. C. Insects.
335:08 Check mark. Correct answer. C. Insects. Right arrow. Explanation. They excrete
335:11 Right arrow. Explanation. They excrete wastes in insects.
335:14 wastes in insects. 897.
335:17 897. Chlorophyll appears green because A
335:20 Chlorophyll appears green because A absorbs red only. B reflects green
335:24 absorbs red only. B reflects green light. Contains iron. D stores starch.
335:29 light. Contains iron. D stores starch. Check mark. Correct answer. B reflects
335:32 Check mark. Correct answer. B reflects green light. Right arrow. Explanation.
335:35 green light. Right arrow. Explanation. Green wavelengths are reflected.
335:38 Green wavelengths are reflected. 898
335:41 898 plant roots absorb A. Carbon dioxide
335:45 plant roots absorb A. Carbon dioxide only, B. Oxygen only, C water and
335:49 only, B. Oxygen only, C water and minerals, D proteins.
335:52 minerals, D proteins. Check mark correct answer. C. Water and
335:55 Check mark correct answer. C. Water and minerals. Right arrow. Explanation.
335:58 minerals. Right arrow. Explanation. Roots take water and souls from soil.
336:02 Roots take water and souls from soil. 899.
336:04 899. Heart pumps blood to body via. A veins,
336:08 Heart pumps blood to body via. A veins, B aortar, C bronchi, D. Uritus.
336:13 B aortar, C bronchi, D. Uritus. Check mark. Correct answer. B. Aort.
336:16 Check mark. Correct answer. B. Aort. Right arrow. Explanation. Aort
336:19 Right arrow. Explanation. Aort distributes blood from the heart.
336:22 distributes blood from the heart. 900. The left atrium receives blood from
336:27 900. The left atrium receives blood from A. Kidneys. B. Pulmonary vein. C. Liver.
336:32 A. Kidneys. B. Pulmonary vein. C. Liver. D. Trachea. Check mark. Correct answer.
336:35 D. Trachea. Check mark. Correct answer. B. Pulmonary vein. Right arrow.
336:38 B. Pulmonary vein. Right arrow. Explanation. Pulmonary vein brings
336:41 Explanation. Pulmonary vein brings oxygenated blood.
336:43 oxygenated blood. 91.
336:45 91. Blood pressure is measured using A.
336:48 Blood pressure is measured using A. Thermometer, B. Barometer, C spug
336:52 Thermometer, B. Barometer, C spug mometer, D stethoscope.
336:56 mometer, D stethoscope. Check mark. Correct answer. C. Spug
336:59 Check mark. Correct answer. C. Spug momentter. Right arrow. Explanation.
337:01 momentter. Right arrow. Explanation. Asphaginometer measures arterial
337:04 Asphaginometer measures arterial pressure.
337:06 pressure. 92.
337:08 92. The main function of will. A. Pump
337:11 The main function of will. A. Pump blood. B. Produce hormones. C. Absorb
337:15 blood. B. Produce hormones. C. Absorb nutrients. D. Release oxygen.
337:19 nutrients. D. Release oxygen. Check mark. Correct answer. C. Absorb
337:22 Check mark. Correct answer. C. Absorb nutrients. Right arrow. Explanation.
337:25 nutrients. Right arrow. Explanation. Will he increase surface area in the
337:28 Will he increase surface area in the intestine?
337:30 intestine? 93.
337:32 93. The left ventricle pumps blood to A.
337:35 The left ventricle pumps blood to A. Lungs only, B whole body, C brain only,
337:40 Lungs only, B whole body, C brain only, D kidneys only. Check mark correct
337:44 D kidneys only. Check mark correct answer. B whole body, right arrow.
337:47 answer. B whole body, right arrow. Explanation. Left ventricle pumps
337:50 Explanation. Left ventricle pumps oxygenated blood via the aorta.
337:54 oxygenated blood via the aorta. 94.
337:56 94. Photosynthesis takes place in A
337:59 Photosynthesis takes place in A mitochondria, B ribosomes, C
338:02 mitochondria, B ribosomes, C chloroplasts, D nucleus.
338:06 chloroplasts, D nucleus. Check mark correct answer. C
338:09 Check mark correct answer. C chloroplasts. Right arrow. Explanation.
338:12 chloroplasts. Right arrow. Explanation. Chloroplasts contain chlorophyll for
338:14 Chloroplasts contain chlorophyll for photosynthesis.
338:17 photosynthesis. 95.
338:19 95. The valve between stomach and small
338:21 The valve between stomach and small intestine.
338:23 intestine. A. Cardiac sphincter. B. Pylorax
338:26 A. Cardiac sphincter. B. Pylorax sphincter. C. Mitral valve. D.
338:30 sphincter. C. Mitral valve. D. Triricusper valve. Check mark. Correct
338:33 Triricusper valve. Check mark. Correct answer. B. Pylorax sphincter. Right
338:36 answer. B. Pylorax sphincter. Right arrow. Explanation. It controls food
338:39 arrow. Explanation. It controls food release into small intestine.
338:42 release into small intestine. 96.
338:44 96. Exhaled air contains more. A. Oxygen. B.
338:49 Exhaled air contains more. A. Oxygen. B. Hydrogen. C. Carbon dioxide. D.
338:52 Hydrogen. C. Carbon dioxide. D. Nitrogen.
338:54 Nitrogen. Check mark. Correct answer. C. Carbon
338:57 Check mark. Correct answer. C. Carbon dioxide. Right arrow. Explanation.
339:00 dioxide. Right arrow. Explanation. Co-increases in exhaled air.
339:03 Co-increases in exhaled air. 97.
339:05 97. The nephron's filtration unit is called
339:09 The nephron's filtration unit is called A. Alvolus. B. Bowman's capsule. C.
339:13 A. Alvolus. B. Bowman's capsule. C. Bronchule. D. Atrium.
339:16 Bronchule. D. Atrium. Check mark. Correct answer. B. Bowman's
339:19 Check mark. Correct answer. B. Bowman's capsule. Right arrow. Explanation. It
339:22 capsule. Right arrow. Explanation. It filters plasma in kidneys.
339:26 filters plasma in kidneys. 98.
339:28 98. The rhythmic contraction of food pipe is
339:31 The rhythmic contraction of food pipe is A. Digestion, B respiration, C per
339:35 A. Digestion, B respiration, C per paristalysis, D filtration.
339:39 paristalysis, D filtration. Check mark. Correct answer. C.
339:41 Check mark. Correct answer. C. Paristalysis. Right arrow. Explanation.
339:44 Paristalysis. Right arrow. Explanation. Paristalysis pushes food along
339:47 Paristalysis pushes food along esophagus.
339:49 esophagus. 99.
339:51 99. The pulmonary vein carries blood to the
339:54 The pulmonary vein carries blood to the A. Lungs, B liver, C left atrium, D
339:59 A. Lungs, B liver, C left atrium, D right ventricle.
340:02 right ventricle. Check mark correct answer. C left
340:05 Check mark correct answer. C left atrium, right arrow. Explanation.
340:07 atrium, right arrow. Explanation. Pulmonary veins bring oxygenated blood.
340:12 Pulmonary veins bring oxygenated blood. 910.
340:14 910. Lipase enzyme digests. A. Proteins. B.
340:18 Lipase enzyme digests. A. Proteins. B. Carbohydrates. C. Lipids. D. Nucleic
340:22 Carbohydrates. C. Lipids. D. Nucleic acids.
340:24 acids. Check mark. Correct answer. C. Lipids.
340:27 Check mark. Correct answer. C. Lipids. Right arrow. Explanation. Lipase breaks
340:30 Right arrow. Explanation. Lipase breaks down fats.
340:32 down fats. 911.
340:34 911. Heart sounds are produced by A. Muscles
340:38 Heart sounds are produced by A. Muscles stretching. B. Lungs inflating. C. Valve
340:42 stretching. B. Lungs inflating. C. Valve closure. D. Blood cells splitting.
340:46 closure. D. Blood cells splitting. Check mark. Correct answer. C. Valve
340:49 Check mark. Correct answer. C. Valve closure. Right arrow explanation. Valve
340:52 closure. Right arrow explanation. Valve movement makes loved dub.
340:55 movement makes loved dub. 912.
340:57 912. Chlorophyll traps. A. Heat energy only.
341:01 Chlorophyll traps. A. Heat energy only. B. Water molecules. C. Sunlight energy.
341:06 B. Water molecules. C. Sunlight energy. D. Oxygen.
341:08 D. Oxygen. Check mark. Correct answer. C. Sunlight
341:11 Check mark. Correct answer. C. Sunlight energy. Right arrow. Explanation.
341:14 energy. Right arrow. Explanation. Chlorophyll absorbs sunlight for food
341:16 Chlorophyll absorbs sunlight for food production.
341:18 production. 913
341:20 913 Plants release oxygen during A.
341:24 Plants release oxygen during A. Germination, B. Photosynthesis, C
341:28 Germination, B. Photosynthesis, C respiration, D seed dispersal.
341:31 respiration, D seed dispersal. Check mark correct answer. B
341:34 Check mark correct answer. B photosynthesis. Right arrow explanation.
341:37 photosynthesis. Right arrow explanation. O is a byproduct of photosynthesis.
341:41 O is a byproduct of photosynthesis. 914.
341:43 914. The primary nitrogenous waste in humans.
341:47 The primary nitrogenous waste in humans. A. Ammonia. B. Glucose. C. URA. D.
341:52 A. Ammonia. B. Glucose. C. URA. D. Lactic acid.
341:54 Lactic acid. Check mark. Correct answer. C. URA.
341:57 Check mark. Correct answer. C. URA. Right arrow. Explanation. URA forms from
342:01 Right arrow. Explanation. URA forms from amino acid breakdown.
342:04 amino acid breakdown. 915.
342:06 915. Trachea branches into a veins b bronchi.
342:11 Trachea branches into a veins b bronchi. C. Nefrons. D. Alvoli directly.
342:15 C. Nefrons. D. Alvoli directly. Check mark. Correct answer. B. Bronchi
342:19 Check mark. Correct answer. B. Bronchi right arrow. Explanation. Bronai divide
342:22 right arrow. Explanation. Bronai divide air to lungs.
342:24 air to lungs. 916.
342:26 916. Hemoglobin binds with A. Nitrogen. B.
342:31 Hemoglobin binds with A. Nitrogen. B. Iron. C. Oxygen. D. Glucose.
342:35 Iron. C. Oxygen. D. Glucose. Check mark. Correct answer. C. Oxygen.
342:38 Check mark. Correct answer. C. Oxygen. Right arrow. Explanation it carries
342:41 Right arrow. Explanation it carries oxygen in blood.
342:44 oxygen in blood. 917
342:46 917 Bile helps in A. Making hormones, B.
342:50 Bile helps in A. Making hormones, B. Emulsifying fats, C storing blood, D
342:54 Emulsifying fats, C storing blood, D building bones.
342:56 building bones. Check mark correct answer. B.
342:59 Check mark correct answer. B. Emulsifying fats. Right arrow.
343:01 Emulsifying fats. Right arrow. Explanation. Bile breaks fat into tiny
343:04 Explanation. Bile breaks fat into tiny droplets.
343:06 droplets. 918.
343:09 918. The longest part of digestive system is
343:12 The longest part of digestive system is A esophagus, B large intestine, C small
343:17 A esophagus, B large intestine, C small intestine, D rectum. Check mark correct
343:21 intestine, D rectum. Check mark correct answer. C small intestine. Right arrow
343:25 answer. C small intestine. Right arrow explanation. It absorbs nutrients.
343:29 explanation. It absorbs nutrients. 919.
343:31 919. Excess glucose converts to A. Amino
343:35 Excess glucose converts to A. Amino acids, B. Fat, C, D, N, A, D, Oxygen.
343:41 acids, B. Fat, C, D, N, A, D, Oxygen. Check mark correct answer. B fat. Right
343:45 Check mark correct answer. B fat. Right arrow. Explanation. Excess energy is
343:48 arrow. Explanation. Excess energy is stored as fat.
343:50 stored as fat. 920.
343:52 920. Bronchios end in a veins, B. Willie, C
343:57 Bronchios end in a veins, B. Willie, C alvoli, D arteries.
344:00 alvoli, D arteries. Check mark. Correct answer. C alvoli.
344:03 Check mark. Correct answer. C alvoli. Right arrow explanation. Alvoli exchange
344:07 Right arrow explanation. Alvoli exchange gases.
344:09 gases. 921.
344:12 921. The liver stores A. Bile, B vitamins
344:16 The liver stores A. Bile, B vitamins only, C iron only, D oxygen only. Check
344:21 only, C iron only, D oxygen only. Check mark. Correct answer. A. Bile. Right
344:24 mark. Correct answer. A. Bile. Right arrow. Explanation. Bile is stored for
344:27 arrow. Explanation. Bile is stored for fat digestion.
344:30 fat digestion. 922.
344:32 922. Human blood has red color due to a
344:35 Human blood has red color due to a plasma, B fat droplets, C hemoglobin,
344:40 plasma, B fat droplets, C hemoglobin, DNA.
344:43 DNA. Check mark correct answer. C hemoglobin.
344:46 Check mark correct answer. C hemoglobin. Right arrow. Explanation. Iron in
344:49 Right arrow. Explanation. Iron in hemoglobin makes blood red.
344:52 hemoglobin makes blood red. 923.
344:55 923. Excreary products in plants can be A
344:58 Excreary products in plants can be A proteins, B gums and resins, C
345:02 proteins, B gums and resins, C chlorophyll, D stoometer.
345:05 chlorophyll, D stoometer. Check mark correct answer. B gums and
345:09 Check mark correct answer. B gums and resins. Right arrow. Explanation. Plants
345:12 resins. Right arrow. Explanation. Plants store wastes in forms like gums.
345:16 store wastes in forms like gums. 924.
345:18 924. An aerobic respiration occurs without A
345:22 An aerobic respiration occurs without A glucose, B water, C oxygen, D light.
345:28 glucose, B water, C oxygen, D light. Check mark. Correct answer. C oxygen.
345:31 Check mark. Correct answer. C oxygen. Right arrow. Explanation. Anorobic means
345:34 Right arrow. Explanation. Anorobic means absence of O.
345:37 absence of O. 925.
345:39 925. Broni divide from the A. Kidneys. B.
345:44 Broni divide from the A. Kidneys. B. Diaphragm. C. Trachea. D. Aort.
345:48 Diaphragm. C. Trachea. D. Aort. Check mark. Correct answer. C. Trachea.
345:51 Check mark. Correct answer. C. Trachea. Right arrow. Explanation. Trachea splits
345:54 Right arrow. Explanation. Trachea splits into bronchi.
345:57 into bronchi. 926.
346:00 926. Heart's upper chambers are called A.
346:03 Heart's upper chambers are called A. Ventricles. B. Alvoli. C. Atria. D.
346:07 Ventricles. B. Alvoli. C. Atria. D. Nefrons.
346:09 Nefrons. Check mark. Correct answer. C. Atria.
346:12 Check mark. Correct answer. C. Atria. Right arrow. Explanation. Atria receive
346:15 Right arrow. Explanation. Atria receive blood.
346:17 blood. 927.
346:20 927. The pigment in red blood cells is A.
346:23 The pigment in red blood cells is A. Melanin, B chlorophyll, C hemoglobin, D
346:28 Melanin, B chlorophyll, C hemoglobin, D albumin.
346:30 albumin. Check mark correct answer. C hemoglobin.
346:33 Check mark correct answer. C hemoglobin. Right arrow. Explanation. Hemoglobin
346:36 Right arrow. Explanation. Hemoglobin binds oxygen.
346:38 binds oxygen. 928.
346:41 928. Blood leaving lungs is rich in A C O B O
346:46 Blood leaving lungs is rich in A C O B O C nitrogen D iron only. Check mark
346:51 C nitrogen D iron only. Check mark correct answer B O right arrow
346:54 correct answer B O right arrow explanation oxygen enters blood in
346:57 explanation oxygen enters blood in lungs.
346:59 lungs. 929.
347:02 929. Digestion of starch begins in A small
347:06 Digestion of starch begins in A small intestine, B stomach, C mouth, D lungs.
347:12 intestine, B stomach, C mouth, D lungs. Check mark correct answer. C mouth right
347:15 Check mark correct answer. C mouth right arrow. Explanation. Salivary amalayise
347:18 arrow. Explanation. Salivary amalayise break starch.
347:21 break starch. 930.
347:23 930. Malpigian tubules remove waste in A.
347:26 Malpigian tubules remove waste in A. Humans, B. Birds, C insects, D fish.
347:32 Humans, B. Birds, C insects, D fish. Check mark correct answer. C insects.
347:35 Check mark correct answer. C insects. Right arrow. Explanation. They serve as
347:38 Right arrow. Explanation. They serve as excretory organs in insects.
347:42 excretory organs in insects. 931.
347:44 931. Blood's liquid portion is A fat, B
347:48 Blood's liquid portion is A fat, B plasma, C D N A D cartilage.
347:54 plasma, C D N A D cartilage. Check mark correct answer. B plasma.
347:57 Check mark correct answer. B plasma. Right arrow explanation. Plasma carries
348:00 Right arrow explanation. Plasma carries dissolved substances.
348:03 dissolved substances. 932.
348:06 932. Bile is produced by the A. Heart. B.
348:10 Bile is produced by the A. Heart. B. Lungs. C. Liver. D. Kidneys.
348:14 Lungs. C. Liver. D. Kidneys. Check mark. Correct answer. C. Liver.
348:17 Check mark. Correct answer. C. Liver. Right arrow. Explanation. Liver makes
348:20 Right arrow. Explanation. Liver makes bile for digestion.
348:23 bile for digestion. 933.
348:26 933. The energy currency of the cell is a dna
348:31 The energy currency of the cell is a dna bp
348:33 bp c lipod d hemoglobin.
348:36 c lipod d hemoglobin. Check mark correct answer bp right arrow
348:41 Check mark correct answer bp right arrow explanation. ATP stores and releases
348:44 explanation. ATP stores and releases energy.
348:46 energy. 934.
348:48 934. Gas exchange in lungs occurs in A
348:52 Gas exchange in lungs occurs in A bronchioles, B bronchi, C alvoli, D
348:56 bronchioles, B bronchi, C alvoli, D trachea.
348:58 trachea. Check mark correct answer. C alvoli
349:01 Check mark correct answer. C alvoli right arrow. Explanation alvoli exchange
349:05 right arrow. Explanation alvoli exchange O and CO.
349:07 O and CO. 935.
349:10 935. Plants lose water by A. Breathing, B.
349:14 Plants lose water by A. Breathing, B. Excretion, C. Transpiration, D.
349:17 Excretion, C. Transpiration, D. Photosynthesis.
349:19 Photosynthesis. Check mark. Correct answer. C.
349:22 Check mark. Correct answer. C. Transpiration. Right arrow. Explanation.
349:25 Transpiration. Right arrow. Explanation. Water evaporates from leaves.
349:28 Water evaporates from leaves. 936.
349:31 936. RBC's lack. A. Nucleus. B. Cytoplasm. C.
349:37 RBC's lack. A. Nucleus. B. Cytoplasm. C. Hemoglobin. D. Plasma. Check mark.
349:40 Hemoglobin. D. Plasma. Check mark. Correct answer. A nucleus right arrow
349:44 Correct answer. A nucleus right arrow explanation. Mature RBC's have no
349:47 explanation. Mature RBC's have no nucleus.
349:49 nucleus. 937
349:52 937 Oxygenated blood returns via A.
349:55 Oxygenated blood returns via A. Pulmonary artery. B pulmonary vein. C
349:59 Pulmonary artery. B pulmonary vein. C aort only. D wiener cara.
350:03 aort only. D wiener cara. Check mark. Correct answer. B. Pulmonary
350:06 Check mark. Correct answer. B. Pulmonary vein. Right arrow. Explanation. It
350:09 vein. Right arrow. Explanation. It carries oxygenrich blood.
350:12 carries oxygenrich blood. 938.
350:15 938. The trachea is also called A Windpipe, B
350:19 The trachea is also called A Windpipe, B food pipe, C nephron, D bronchial.
350:24 food pipe, C nephron, D bronchial. Check mark. Correct answer. A windpipe.
350:27 Check mark. Correct answer. A windpipe. Right arrow. Explanation. Trachea
350:30 Right arrow. Explanation. Trachea carries air.
350:32 carries air. 939.
350:35 939. Guard cells surround. A. Xylm. B.
350:38 Guard cells surround. A. Xylm. B. Nefrons. C. Stoometer D. Broni.
350:43 Nefrons. C. Stoometer D. Broni. Check mark. Correct answer. C.
350:46 Check mark. Correct answer. C. Stoometer. Right arrow. Explanation.
350:49 Stoometer. Right arrow. Explanation. Guard cells regulate stoometer.
350:52 Guard cells regulate stoometer. 940.
350:55 940. Oxygen is used in A protein storage, B
350:59 Oxygen is used in A protein storage, B cell respiration, C photosynthesis only,
351:03 cell respiration, C photosynthesis only, D bone growth.
351:06 D bone growth. Check mark. Correct answer. B. Cell
351:08 Check mark. Correct answer. B. Cell respiration. Right arrow explanation O
351:12 respiration. Right arrow explanation O breaks down glucose for energy
351:15 breaks down glucose for energy 941.
351:18 941. The pulmonary artery carries A.
351:21 The pulmonary artery carries A. Oxygenated blood, B deoxxygenated blood,
351:25 Oxygenated blood, B deoxxygenated blood, C lymph, D plasma only. Check mark
351:30 C lymph, D plasma only. Check mark correct answer. B. Deoxxygenated blood.
351:33 correct answer. B. Deoxxygenated blood. Right arrow. Explanation to lungs for
351:36 Right arrow. Explanation to lungs for oxygenation.
351:38 oxygenation. 942.
351:41 942. The human excretary system includes A
351:45 The human excretary system includes A alvoli only, B heart only, C kidneys, D
351:51 alvoli only, B heart only, C kidneys, D willie only. Check mark correct answer C
351:55 willie only. Check mark correct answer C kidneys. Right arrow explanation.
351:58 kidneys. Right arrow explanation. Kidneys filter blood waste.
352:01 Kidneys filter blood waste. 943.
352:04 943. Air enters lungs wire. A. Eophagus. B.
352:08 Air enters lungs wire. A. Eophagus. B. Triche C. Aort D. Kidneys.
352:12 Triche C. Aort D. Kidneys. Check mark. Correct answer. B. Trache.
352:15 Check mark. Correct answer. B. Trache. Right arrow. Explanation. Trachea leads
352:19 Right arrow. Explanation. Trachea leads air into bronchi.
352:21 air into bronchi. 944.
352:24 944. Protein digestion begins in A mouth, B
352:28 Protein digestion begins in A mouth, B lungs, C stomach, D large intestine.
352:33 lungs, C stomach, D large intestine. Check mark. Correct answer. C stomach.
352:36 Check mark. Correct answer. C stomach. Right arrow. Explanation: Pepsin breaks
352:39 Right arrow. Explanation: Pepsin breaks proteins in stomach.
352:42 proteins in stomach. 945.
352:45 945. Exhaled air contains more. A C O B I C D
352:51 Exhaled air contains more. A C O B I C D N A D fat. Check mark. Correct answer. A
352:57 N A D fat. Check mark. Correct answer. A C O. Right arrow. Explanation. Co leaves
353:00 C O. Right arrow. Explanation. Co leaves body during exhalation.
353:03 body during exhalation. 946.
353:06 946. Plants store wastes in A. DNA, B
353:11 Plants store wastes in A. DNA, B chlorophyll, C vacules, D. Lungs.
353:15 chlorophyll, C vacules, D. Lungs. Check mark. Correct answer. C. Vacules.
353:19 Check mark. Correct answer. C. Vacules. Right arrow. Explanation. Vacules store
353:22 Right arrow. Explanation. Vacules store waste products.
353:25 waste products. 947.
353:27 947. Broni are part of A. Digestive system,
353:32 Broni are part of A. Digestive system, B. Respiratory system, C. Excitary
353:36 B. Respiratory system, C. Excitary system, D. Skeletal system.
353:39 system, D. Skeletal system. Check mark. Correct answer. B.
353:42 Check mark. Correct answer. B. Respiratory system. Right arrow.
353:44 Respiratory system. Right arrow. Explanation. Broni carry air to lungs.
353:49 Explanation. Broni carry air to lungs. 948.
353:51 948. RBC's carry a hormones, B. Oxygen, C.
353:56 RBC's carry a hormones, B. Oxygen, C. fatty acids DNA.
354:00 fatty acids DNA. Check mark correct answer B. Oxygen
354:04 Check mark correct answer B. Oxygen right arrow explanation. Hemoglobin in
354:07 right arrow explanation. Hemoglobin in RBC's transports oxygen.
354:10 RBC's transports oxygen. 949.
354:13 949. The human circulatory system is A open,
354:17 The human circulatory system is A open, B closed, C semiopen, D absent.
354:23 B closed, C semiopen, D absent. Check mark. Correct answer. B closed.
354:26 Check mark. Correct answer. B closed. Right arrow explanation. Blood stays
354:29 Right arrow explanation. Blood stays inside vessels.
354:32 inside vessels. 950.
354:34 950. The kidneys remove A. Vitamins. B. URA.
354:38 The kidneys remove A. Vitamins. B. URA. C. Enzymes. D. Fat only. Check mark.
354:43 C. Enzymes. D. Fat only. Check mark. Correct answer. B. URA. Right arrow.
354:46 Correct answer. B. URA. Right arrow. Explanation. URA is filtered into urine.
354:51 Explanation. URA is filtered into urine. 951.
354:54 951. Stormter. Allow. A CO entry, B fat
354:58 Stormter. Allow. A CO entry, B fat storage, C blood flow, D bone growth.
355:03 storage, C blood flow, D bone growth. Check mark correct answer. A co entry.
355:07 Check mark correct answer. A co entry. Right arrow. Explanation. Co-enters
355:10 Right arrow. Explanation. Co-enters leaves for photosynthesis.
355:13 leaves for photosynthesis. 952.
355:16 952. An aerobic respiration in muscles makes
355:20 An aerobic respiration in muscles makes a D NA B. Lactic acid, C. Oxygen only,
355:25 a D NA B. Lactic acid, C. Oxygen only, D. Protein.
355:27 D. Protein. Check mark. Correct answer. B. Lactic
355:31 Check mark. Correct answer. B. Lactic acid. Right arrow. Explanation. Lack of
355:34 acid. Right arrow. Explanation. Lack of O leads to lactic acid buildup.
355:37 O leads to lactic acid buildup. 953.
355:40 953. Photosynthesis creates. A CO B glucose C
355:46 Photosynthesis creates. A CO B glucose C ion D protein only. Check mark. Correct
355:51 ion D protein only. Check mark. Correct answer. B. Glucose right arrow
355:54 answer. B. Glucose right arrow explanation. Plants make glucose for
355:56 explanation. Plants make glucose for food.
355:58 food. 954.
356:01 954. The pulmonary vein carries blood to A.
356:05 The pulmonary vein carries blood to A. Right ventricle. B. Left atrium. C.
356:09 Right ventricle. B. Left atrium. C. Lungs only. D. Kidneys only. Check mark.
356:12 Lungs only. D. Kidneys only. Check mark. Correct answer. B. Left atrium. Right
356:16 Correct answer. B. Left atrium. Right arrow. Explanation. It brings oxygenated
356:19 arrow. Explanation. It brings oxygenated blood.
356:21 blood. 955.
356:23 955. Which enzyme digests proteins? A.
356:27 Which enzyme digests proteins? A. Aalayise. B. Pepsin. C. Lipes. D.
356:31 Aalayise. B. Pepsin. C. Lipes. D. Cellulace.
356:33 Cellulace. Check mark. Correct answer. B. Pepsin.
356:36 Check mark. Correct answer. B. Pepsin. Right arrow. Explanation. Pepsin works
356:39 Right arrow. Explanation. Pepsin works in stomach.
356:41 in stomach. 956.
356:44 956. The rhythmic heartbeat is due to a
356:47 The rhythmic heartbeat is due to a muscle contraction only, b nerve signals
356:51 muscle contraction only, b nerve signals only, c pacemaker activity, d lung
356:55 only, c pacemaker activity, d lung expansion.
356:57 expansion. Check mark correct answer. C pacemaker
357:00 Check mark correct answer. C pacemaker activity right arrow explanation.
357:03 activity right arrow explanation. Pacemaker sets heart rhythm.
357:06 Pacemaker sets heart rhythm. 957
357:09 957 lungs remove a C in water. B D N A C
357:15 lungs remove a C in water. B D N A C blood cells D proteins
357:19 blood cells D proteins check mark correct answer A in water
357:23 check mark correct answer A in water right arrow explanation lungs expel
357:26 right arrow explanation lungs expel waste gases
357:28 waste gases 958
357:31 958 kidneys produce A bile B ura C urine D
357:37 kidneys produce A bile B ura C urine D saliva
357:39 saliva check mark correct answer C urine Right
357:42 check mark correct answer C urine Right arrow explanation. Urine removes waste.
357:47 arrow explanation. Urine removes waste. 959.
357:50 959. Transpiration helps in A. Sunlight
357:53 Transpiration helps in A. Sunlight capture. B. Cooling plants. C.
357:57 capture. B. Cooling plants. C. Breathing. D. Bone growth. Check mark.
358:01 Breathing. D. Bone growth. Check mark. Correct answer. B. Cooling plants. Right
358:04 Correct answer. B. Cooling plants. Right arrow. Explanation. Water loss cools
358:07 arrow. Explanation. Water loss cools plant tissues.
358:09 plant tissues. 960.
358:11 960. Blood plasma is mostly Aion, B protein
358:16 Blood plasma is mostly Aion, B protein only, C water, D carbon dioxide.
358:21 only, C water, D carbon dioxide. Check mark correct answer C water. Right
358:25 Check mark correct answer C water. Right arrow explanation. Plasma is
358:27 arrow explanation. Plasma is approximately 90% water.
358:31 approximately 90% water. 961
358:34 961 RBC's are made in A liver, B bone
358:38 RBC's are made in A liver, B bone marrow, C brain, D kidneys.
358:43 marrow, C brain, D kidneys. Check mark correct answer B bone marrow.
358:46 Check mark correct answer B bone marrow. Right arrow explanation RBCs originate
358:50 Right arrow explanation RBCs originate in bone marrow.
358:52 in bone marrow. 962
358:54 962 The windpipe splits into A. Lungs, B.
358:58 The windpipe splits into A. Lungs, B. Bronchi, C. Kidneys, D. Nefrons.
359:03 Bronchi, C. Kidneys, D. Nefrons. Check mark. Correct answer. B. Bronai.
359:06 Check mark. Correct answer. B. Bronai. Right arrow. Explanation. Bronai lead to
359:10 Right arrow. Explanation. Bronai lead to each lung.
359:12 each lung. 963.
359:14 963. Plant excretion often occurs through A.
359:18 Plant excretion often occurs through A. God cells. B. Roots only, C. Strometer
359:23 God cells. B. Roots only, C. Strometer and leaves, DNA only. Check mark.
359:27 and leaves, DNA only. Check mark. Correct answer. C. Strometer and leaves.
359:30 Correct answer. C. Strometer and leaves. Right arrow. Explanation. Gases and
359:33 Right arrow. Explanation. Gases and wastes exit via leaves.
359:37 wastes exit via leaves. 964.
359:39 964. Oxygen is absorbed in A. Alvoli, B.
359:44 Oxygen is absorbed in A. Alvoli, B. Stomach, C. Kidneys, D. Nefrons.
359:48 Stomach, C. Kidneys, D. Nefrons. Check mark. Correct answer. A. Alvoli.
359:52 Check mark. Correct answer. A. Alvoli. Right arrow. Explanation. Alvoli
359:54 Right arrow. Explanation. Alvoli exchange gases
359:57 exchange gases 965
360:00 965 RBC's health transport A bile B oxygen C
360:06 RBC's health transport A bile B oxygen C hormones D glucose only check mark
360:10 hormones D glucose only check mark correct answer B oxygen right arrow
360:13 correct answer B oxygen right arrow explanation hemoglobin binds oxygen
360:18 explanation hemoglobin binds oxygen 966
360:21 966 plants lose water by A. Absorption. B
360:25 plants lose water by A. Absorption. B germination. C. Transpiration. D.
360:28 germination. C. Transpiration. D. Respiration.
360:30 Respiration. Check mark. Correct answer. C.
360:33 Check mark. Correct answer. C. Transpiration. Right arrow. Explanation.
360:36 Transpiration. Right arrow. Explanation. Water evaporates from leaves.
360:40 Water evaporates from leaves. 967.
360:42 967. The human heart has a one chamber, B two
360:47 The human heart has a one chamber, B two chambers, C three chambers, D four
360:51 chambers, C three chambers, D four chambers.
360:53 chambers. Check mark. Correct answer. D. Four
360:56 Check mark. Correct answer. D. Four chambers. Right arrow. Explanation. Two
360:59 chambers. Right arrow. Explanation. Two atria and two ventricles.
361:02 atria and two ventricles. 968.
361:05 968. Bronchioles end in A. Nerves. B. Alvoli.
361:09 Bronchioles end in A. Nerves. B. Alvoli. C. Plasma. D. Platelets.
361:13 C. Plasma. D. Platelets. Check mark. Correct answer. B. Alvoli.
361:16 Check mark. Correct answer. B. Alvoli. Right arrow. Explanation. Alvoli. RSAX.
361:22 Right arrow. Explanation. Alvoli. RSAX. 969
361:24 969 Kidney filters waste from A. Oxygen, B
361:28 Kidney filters waste from A. Oxygen, B air, C blood, DNA.
361:33 air, C blood, DNA. Check mark. Correct answer. C blood
361:36 Check mark. Correct answer. C blood right arrow. Explanation. Kidneys clean
361:39 right arrow. Explanation. Kidneys clean blood.
361:41 blood. 970.
361:43 970. Hearts loved dub is due to A. Blood
361:47 Hearts loved dub is due to A. Blood cells moving. B. Valve closure. C.
361:51 cells moving. B. Valve closure. C. Stomach digestion. D. DNA replication.
361:56 Stomach digestion. D. DNA replication. Check mark. Correct answer. B. Valve
361:59 Check mark. Correct answer. B. Valve closure. Right arrow. Explanation.
362:01 closure. Right arrow. Explanation. Valves make the sound.
362:04 Valves make the sound. 971.
362:07 971. Bile breaks fat into A. Sugars. B. Large
362:11 Bile breaks fat into A. Sugars. B. Large lumps. C. Tiny droplets. D. DNA strands.
362:17 lumps. C. Tiny droplets. D. DNA strands. Check mark. Correct answer. C. Tiny
362:20 Check mark. Correct answer. C. Tiny droplets. Right arrow. Explanation.
362:23 droplets. Right arrow. Explanation. Emulsification helps enzymes work.
362:27 Emulsification helps enzymes work. 972.
362:30 972. Plants store waste as A. Oxygen B. Gums
362:35 Plants store waste as A. Oxygen B. Gums and resins. C. Vitamins. D. Proteins.
362:39 and resins. C. Vitamins. D. Proteins. Check mark. Correct answer. B. Gums and
362:42 Check mark. Correct answer. B. Gums and resins. Right arrow. Explanation: Wastes
362:45 resins. Right arrow. Explanation: Wastes are stored harmlessly.
362:48 are stored harmlessly. 973.
362:51 973. Plasma transports. A. Fat only. B.
362:55 Plasma transports. A. Fat only. B. Glucose only. C. Hormones and nutrients.
362:59 Glucose only. C. Hormones and nutrients. D. Air. Check mark. Correct answer. C.
363:03 D. Air. Check mark. Correct answer. C. Hormones and nutrients. Right arrow.
363:06 Hormones and nutrients. Right arrow. Explanation. Plasma distributes
363:08 Explanation. Plasma distributes substances.
363:11 substances. 974.
363:13 974. Blood in veins is mostly A oxygenated, B
363:18 Blood in veins is mostly A oxygenated, B deoxxygenated, C pure water, D iron
363:22 deoxxygenated, C pure water, D iron only. Check mark correct answer. B de
363:26 only. Check mark correct answer. B de oxygenated. Right arrow explanation
363:30 oxygenated. Right arrow explanation veins bring blood low in oxygen.
363:33 veins bring blood low in oxygen. 975.
363:36 975. Stoer help in A. Absorbing minerals, B.
363:41 Stoer help in A. Absorbing minerals, B. Breathing in plants. C. Blood transport.
363:45 Breathing in plants. C. Blood transport. D. Hearing sounds.
363:47 D. Hearing sounds. Check mark. Correct answer. B. Breathing
363:50 Check mark. Correct answer. B. Breathing in plants. Right arrow. Explanation.
363:53 in plants. Right arrow. Explanation. Gases move in out through stoometer.
363:57 Gases move in out through stoometer. 976.
364:00 976. Co-exits body via A. Liver, B. Brain, C
364:06 Co-exits body via A. Liver, B. Brain, C lungs, D. Kidneys.
364:09 lungs, D. Kidneys. Check mark. Correct answer C. Lungs
364:12 Check mark. Correct answer C. Lungs right arrow. Explanation. Core leaves
364:15 right arrow. Explanation. Core leaves during exhalation.
364:18 during exhalation. 977.
364:21 977. URA is formed in A. Heart, B. Lungs, C
364:25 URA is formed in A. Heart, B. Lungs, C liver, D brain.
364:28 liver, D brain. Check mark. Correct answer. C. Liver.
364:31 Check mark. Correct answer. C. Liver. Right arrow. Explanation. Liver converts
364:34 Right arrow. Explanation. Liver converts ammonia to ura.
364:37 ammonia to ura. 978.
364:40 978. Oxygen in blood binds to A. DNA, B
364:45 Oxygen in blood binds to A. DNA, B chlorophyll, C hemoglobin, D fats.
364:50 chlorophyll, C hemoglobin, D fats. Check mark correct answer. C hemoglobin.
364:53 Check mark correct answer. C hemoglobin. Right arrow. Explanation. Hemoglobin
364:56 Right arrow. Explanation. Hemoglobin carries oxygen.
364:59 carries oxygen. 979.
365:02 979. Excess water exits plants wire. A. Gums.
365:06 Excess water exits plants wire. A. Gums. B. Photosynthesis. C. Transpiration. D.
365:10 B. Photosynthesis. C. Transpiration. D. Digestion.
365:12 Digestion. Check mark. Correct answer. C.
365:15 Check mark. Correct answer. C. Transpiration. Right arrow. Explanation.
365:18 Transpiration. Right arrow. Explanation. Water evaporates through leaves.
365:22 Water evaporates through leaves. 980.
365:24 980. The respiratory system includes A.
365:27 The respiratory system includes A. Kidneys only. B trachea and lungs. C.
365:31 Kidneys only. B trachea and lungs. C. Heart valves. DNA only.
365:35 Heart valves. DNA only. Check mark. Correct answer. B. Trachea
365:38 Check mark. Correct answer. B. Trachea in lungs. Right arrow. Explanation.
365:41 in lungs. Right arrow. Explanation. Trachea leads air into lungs.
365:45 Trachea leads air into lungs. 981.
365:47 981. Oxygenated blood returns wire. A.
365:51 Oxygenated blood returns wire. A. Pulmonary vein. B. Aort. C. Trachea. D.
365:55 Pulmonary vein. B. Aort. C. Trachea. D. Nefrons.
365:57 Nefrons. Check mark. Correct answer. A. Pulmonary
366:00 Check mark. Correct answer. A. Pulmonary vein. Right arrow. Explanation.
366:03 vein. Right arrow. Explanation. Pulmonary veins bring oxygenrich blood.
366:07 Pulmonary veins bring oxygenrich blood. 982.
366:10 982. The pancreas produces A hemoglobin, B
366:14 The pancreas produces A hemoglobin, B enzymes and insulin, C bile salts only,
366:18 enzymes and insulin, C bile salts only, DNA.
366:21 DNA. Check mark correct answer. B enzymes and
366:24 Check mark correct answer. B enzymes and insulin. Right arrow explanation. It
366:27 insulin. Right arrow explanation. It aids digestion and sugar control.
366:31 aids digestion and sugar control. 983.
366:33 983. The lungs exchange. A. Glucose. B D N A
366:38 The lungs exchange. A. Glucose. B D N A C Oxygen and CO D proteins.
366:43 C Oxygen and CO D proteins. Check mark. Correct answer. C. Oxygen
366:46 Check mark. Correct answer. C. Oxygen and CO. Right arrow. Explanation. Lung
366:50 and CO. Right arrow. Explanation. Lung swap gases with blood.
366:53 swap gases with blood. 984.
366:55 984. Heart valves prevent. A. Bone growth. B.
366:59 Heart valves prevent. A. Bone growth. B. DNA change. C. Blood backflow. D. Water
367:04 DNA change. C. Blood backflow. D. Water loss.
367:06 loss. Check mark. Correct answer. C. Blood
367:09 Check mark. Correct answer. C. Blood backflow. Right arrow. Explanation.
367:12 backflow. Right arrow. Explanation. Valves ensure oneway blood flow.
367:15 Valves ensure oneway blood flow. 985.
367:18 985. Chlorophyll absorbs. A sound. B. Water
367:22 Chlorophyll absorbs. A sound. B. Water vapor. C. Sunlight. D. Nitrogen.
367:27 vapor. C. Sunlight. D. Nitrogen. Check mark. Correct answer. C. Sunlight.
367:30 Check mark. Correct answer. C. Sunlight. Right arrow. Explanation. Sunlight
367:33 Right arrow. Explanation. Sunlight powers photosynthesis.
367:36 powers photosynthesis. 986
367:39 986 Broni divide into A nephrons, B lungs
367:43 Broni divide into A nephrons, B lungs only, C bronchules, D platelets.
367:48 only, C bronchules, D platelets. Check mark correct answer C bronchioles
367:52 Check mark correct answer C bronchioles right arrow. Explanation bronchioles
367:55 right arrow. Explanation bronchioles carry air deeper.
367:57 carry air deeper. 987
368:00 987 plants perform respiration. A only in
368:04 plants perform respiration. A only in dark. B only in light. C day and night.
368:08 dark. B only in light. C day and night. D never.
368:10 D never. Check mark. Correct answer. C day and
368:13 Check mark. Correct answer. C day and night. Right arrow. Explanation.
368:15 night. Right arrow. Explanation. Respiration always occurs.
368:19 Respiration always occurs. 988.
368:20 988. URA leaves the body wire. A. Saliva. B.
368:25 URA leaves the body wire. A. Saliva. B. Sweat only. C. Urine. D. Lungs.
368:30 Sweat only. C. Urine. D. Lungs. Check mark. Correct answer. C urine
368:33 Check mark. Correct answer. C urine right arrow explanation URA is filtered
368:36 right arrow explanation URA is filtered into urine.
368:39 into urine. 989
368:41 989 guard cells open close A. Xylm B stomter
368:47 guard cells open close A. Xylm B stomter C nephrons D veins.
368:50 C nephrons D veins. Check mark. Correct answer. B stomter.
368:54 Check mark. Correct answer. B stomter. Right arrow explanation. They control p
368:57 Right arrow explanation. They control p size.
368:59 size. 990
369:01 990 oxygen diffuses into A here B plasma C
369:07 oxygen diffuses into A here B plasma C RBC BC's D bones check mark correct
369:11 RBC BC's D bones check mark correct answer C RBC's right arrow explanation
369:16 answer C RBC's right arrow explanation oxygen binds hemoglobin
369:19 oxygen binds hemoglobin 991
369:22 991 the largest vein is A aorta B pulmonary
369:26 the largest vein is A aorta B pulmonary vein C winner Power D. Bronchial.
369:31 vein C winner Power D. Bronchial. Check mark. Correct answer. C. Winner
369:34 Check mark. Correct answer. C. Winner cover. Right arrow. Explanation. It
369:36 cover. Right arrow. Explanation. It returns blood to heart.
369:39 returns blood to heart. 992.
369:42 992. Blood leaves heart wire. A. Veins. B.
369:46 Blood leaves heart wire. A. Veins. B. Nerves. C. Arteries. D. Lungs.
369:50 Nerves. C. Arteries. D. Lungs. Check mark. Correct answer. C. Arteries.
369:53 Check mark. Correct answer. C. Arteries. Right arrow. Explanation. Arteries carry
369:56 Right arrow. Explanation. Arteries carry blood away.
369:59 blood away. 993
370:01 993 bile aids in a protein digestion, b fat
370:06 bile aids in a protein digestion, b fat digestion, c glucose storage, DNA
370:10 digestion, c glucose storage, DNA replication.
370:12 replication. Check mark correct answer. B fat
370:15 Check mark correct answer. B fat digestion. Right arrow explanation. Bile
370:19 digestion. Right arrow explanation. Bile emulsifies fats.
370:21 emulsifies fats. 994.
370:24 994. Water loss from leaves is A filtration,
370:28 Water loss from leaves is A filtration, B transpiration, C digestion, D
370:32 B transpiration, C digestion, D respiration.
370:34 respiration. Check mark correct answer. B
370:36 Check mark correct answer. B transpiration. Right arrow. Explanation.
370:39 transpiration. Right arrow. Explanation. Water evaporates from leaves.
370:43 Water evaporates from leaves. 995.
370:45 995. Blood is pumped by A. Lungs, B. Kidneys,
370:50 Blood is pumped by A. Lungs, B. Kidneys, C heart, D brain.
370:53 C heart, D brain. Check mark. Correct answer. C. Heart.
370:56 Check mark. Correct answer. C. Heart. Right arrow. Explanation. Heart pumps
370:59 Right arrow. Explanation. Heart pumps blood through vessels.
371:02 blood through vessels. 996.
371:05 996. RBC's live about A 1 hour, B
371:10 RBC's live about A 1 hour, B 120 days, C 10 years, D 1 month. Check
371:15 120 days, C 10 years, D 1 month. Check mark. Correct answer. B 120 days. Right
371:20 mark. Correct answer. B 120 days. Right arrow. Explanation. Average lifespan of
371:23 arrow. Explanation. Average lifespan of RBC's
371:25 RBC's 997.
371:28 997. The heart's natural pacemaker is A.
371:32 The heart's natural pacemaker is A. Aort, B nephrons, C sa node, D. Lungs.
371:38 Aort, B nephrons, C sa node, D. Lungs. Check mark. Correct answer. C. SA node.
371:41 Check mark. Correct answer. C. SA node. Right arrow. Explanation. It triggers
371:44 Right arrow. Explanation. It triggers heartbeats.
371:46 heartbeats. 998.
371:49 998. Plants absorb CO from A soil, B water, C
371:54 Plants absorb CO from A soil, B water, C air, D stoometer only. Check mark.
371:58 air, D stoometer only. Check mark. Correct answer. C air. Right arrow.
372:02 Correct answer. C air. Right arrow. Explanation. Air supplies CO for
372:04 Explanation. Air supplies CO for photosynthesis.
372:07 photosynthesis. 999.
372:08 999. The lungs are protected by A. Skull, B
372:13 The lungs are protected by A. Skull, B rib cage, C pelvis, D spine only. Check
372:18 rib cage, C pelvis, D spine only. Check mark. Correct answer. B. Rib cage. Right
372:22 mark. Correct answer. B. Rib cage. Right arrow. Explanation. Ribs shield lungs
372:25 arrow. Explanation. Ribs shield lungs and heart.
372:27 and heart. 1,000. The human heart beats about. A 20
372:32 1,000. The human heart beats about. A 20 times per minute. B. 72 times per
372:35 times per minute. B. 72 times per minute. C. Five times per minute. D. 200
372:39 minute. C. Five times per minute. D. 200 times per minute. Check mark. Correct
372:43 times per minute. Check mark. Correct answer. B. 72 times per minute. Right
372:46 answer. B. 72 times per minute. Right arrow. Explanation: Average normal pulse
372:50 arrow. Explanation: Average normal pulse rate.
372:51 rate. You now have 1,000 MCQs for class 10
372:55 You now have 1,000 MCQs for class 10 science. Chapter 5, life processes, each
372:59 science. Chapter 5, life processes, each with correct answers and explanations
373:01 with correct answers and explanations drawn from NCERT concepts.
373:05 drawn from NCERT concepts. Great job sticking with this marathon.
