MCQ TEST Chapter=1 "HOMEOSTASIS"

Q:1: Homeostasis is the process of maintaining a constant _______________environment despite _________________ conditions.

(A) External, internal

(B) Internal, external

(C) Both A and B

(D) None of these

Q:2: Homeostasis is based on

(A) Thermoregulation only

(B) Catabolism

(C) Feed back mechanism

(D) Anabolism

Q:3: Two major control centers for homeostasis are

(A) Exocrine and Endocrine glands

(B) Apocrine and Heterocrine glands

(C) Receptors and Effectors

(D) Brain and Endocrine glands

Q:4: Which of the following activity is regulated by Homeostasis

(A) Temperature

(B) Water balance

(C) Blood sugar level

(D) All A, B and C

Q:5: what should be the "Regulator" in this chart?

(A) Medulla oblangata

(B) Pituitary gland

(C) Spinal cord

(D) Hypothalamus

Q:6: What are the components of feed back mechanism?

(A) Receptors, Insulators, Effectors

(B) Receptors, Suppressors, Effectors

(C) Receptors, Regulators, Effectors

(D) Receptors, Depressors, Effectors

Q:7: A cell is placed in a solution and swells. This solution is

(A) Isotonic to cell

(B) Hypertonic to cell

(C) Hypotonic to cell

(D) None of these

Q:8: In an isotonic solution there would be

(A) No net movement of water

(B) Net movement of water into the cell

(C) Net movement of water out of the cell

(D) Bursting of the cell

Q:9: A cell whose internal salt concentration is 0.3 /liter is placed in a solution having salt concentration 0.5 /liter. The solution is

(A) Isotonic to the cell

(B) Hypotonic to the cell

(C) Hypertonic to cell

(D) None of these

Q:10: Osmosis is defined as

(A) Flow of solvent (water) through Semipermeable membrane from higher to less
Concentrated solution

(B) Flow of solvent (water) through Semipermeable membrane from less to higher
Concentrated solution

(C) Flow of a solute from a Semipermeable membrane

(D) Flow of water without membrane

Q:11: Plasmolysis of a human red blood cell would occur if the cell were

(A) In an isotonic solution

(B) In a hypertonic solution

(C) In a hypotonic solution

(D) None of the above

Q:12: When an animal cell is placed in a hypotonic environment, it will

(A) Undergo cytolysis

(B) Undergo plasmolysis

(C) Be at equilibrium

(D) Its turgor pressure decreases

Q:13: The contractile vacuole of a paramecium should be active when the paramecium is in

(A) An isotonic environment

(B) A hypotonic environment

(C) A hypertonic environment

(D) Any environment

Q:14: The tendency of a solution to take up water when separated from pure water by a selectively permeable membrane is called

(A) Osmotic pressure

(B) Turgor pressure

(C) Diffusion pressure deficit

(D) Water potential

Q:15: Xerophytes have

(A) Deep roots for water uptake

(B) Succulent stems for storage of water

(C) Few stomata to limit water loss

(D) All A, B and C

Q:16: A plant without cuticle in leaves and stem, having increased number of stomata, partially or completely submerged in water is

(A) Mesophyte

(B) Hydrophyte

(C) Both A and B

(D) Halophyte

Q:17: The entry of water from salty soil into the roots of halophytes takes place because the root cells of halophytes develop

(A) High water potential

(B) Low osmotic pressure

(C) Low water potential

(D) All of these

Q:18: ______________ are animals that do not adjust their internal osmolarity and are isotonic with their environment .

(A) Osmoconformers

(B) Osmoregulators

(C) Thermoregulators

(D) Thermoconfermors

Q:19: ______________ are animals that are not isotonic with their environment and have developed mechanisms to regulate their internal solute and water concentrations.

(A) Osmoconformers

(B) Osmoregulators

(C) Thermoregulators

(D) Both A and B

Q:20: What is correct for diagram below?

(A) Cell "A" will lose H2O, Cell "B" will gain H2O, Cell "C" neither gain nor loses H2O

(B) Cell "A" neither gain nor loses H2O, Cell "B" will gain H2O, Cell "C" will lose H2O

(C) Cell "A" will gain, Cell "B" neither gain nor loses H2O, Cell "C" will lose H2O

(D) Cell "A" will gain H2O, Cell "B" will lose H2O, Cell "C" neither gain nor loses H2O

Q:21: An increase in blood sugar level triggers the release of the hormone insulin by the pancreas, the hormone insulin lowers blood sugar level restoring the body to its original blood glucose level by converting glucose to glycogen. This is an example of

(A) Positive feed back

(B) Negative feed back

(C) Homeostatic imbalance

(D) None of these

Q:22: A fish in fresh water

(A) Produces dilute urine

(B) Have a hypertonic body

(C) Produces concentrated urine

(D) A and B

Q:23: Sea water is _________________________ to Hag-fishes.

(A) Isotonic

(B) Hypotonic

(C) Hypertonic

(D) None of these

Q:24: A fish in marine water

(A) Produces concentrated urine

(B) Have a hypotonic body

(C) Produces dilute urine

(D) A and B

Q:25: Metabolic water is

(A) Water outside the cells of animals

(B) Produced by oxidation of fats

(C) Useful to desert mammals

(D) B and C

Q:26: Plants do not excrete ammonia, urea and uric acid because

(A) They lack nitrogenous compounds

(B) Their metabolism is protein based

(C) Their nitrogenous products are recycled

(D) All A, B and C

Q:27: Plants excrete

(A) Excess water

(B) Excess oxygen

(C) Excess carbon dioxide

(D) All A, B and C

Q:28: Which one of the following has maximum toxicity?

(A) Ammonia

(B) Urea

(C) Uric acid

(D) Creatinine

Q:29: Which one of the following has medium toxicity?

(A) Ammonia

(B) Urea

(C) Uric acid

(D) Water

Q:30: Which one of the following has least toxicity?

(A) Ammonia

(B) Urea

(C) Uric acid

(D) All are highly toxic

Q:31: Guttation takes place through

(A) Stomata

(B) Injured tissue

(C) Lenticels

(D) Hydathodes

Q:32: The excretory organs of Planaria are known as

(A) Protonephridia

(B) Flame cells

(C) Both A and B

(D) Metanephridia

Q:33: Tubular excretory system of Earth worm consist of

(A) Protonephridia

(B) Coxal glands

(C) Malpighian tubules

(D) Metanephridia

Q:34: The internal opening of the metanephridium is known as

(A) Nephrostome

(B) Nephridiopore

(C) Excretory pore

(D) All A, B and C

Q:35: Liver Synthesize

(A) Non-essential aminoacids

(B) Plasma proteins

(C) Cholesterol

(D) All A, B and C

Q:36: In humans, excess nitrogen is eliminated from the body by mainly converting it to

(A) Urea

(B) Uric acid

(C) Ammonia

(D) Amine phosphate

Q:37: The liver is

(A) Smallest internal organ

(B) Medium-sized internal organ

(C) Body's largest internal organ

(D) All options are incorrect

Q:38: The three major body fuels managed by the liver are

(A) Protein, vitamins, and minerals

(B) Carbohydrate, fat, and protein

(C) Glucose, fructose, and sucrose

(D) Glucose, iron, and protein

Q:39: Pigments found in bile are formed during ______________ catabolism

(A) Haem catabolism

(B) Globin catabolism

(C) Cholesterol Catabolism

(D) Both A and C

Q:40: The nephron is

(A) The site of urine storage

(B) The functional unit of the kidney

(C) The site where ADH is produced

(D) Also called the "Bowman's capsule"

Q:41: From the distal convoluted tubule, filtrate will then be carried to the:

(A) Renal corpuscle

(B) Collecting duct

(C) Nephron loop

(D) Proximal convoluted tubule

Q:42: All of the following are normally found in urine except

(A) Sodium ions

(B) Uric acid

(C) Creatinine

(D) Glucose

Q:43: _______________ hormone regulates the transfer of sodium from the nephron to the blood.

(A) Parathormone

(B) Anti-diuretic

(C) Aldosterone

(D) Vasopression

Q:44: Conversion of ammonia into urea, occurs in

(A) Kidneys

(B) Lungs

(C) Intestine

(D) Liver

Q:45: Separation of amino acid into amino and carboxyl group is known as

(A) Amination

(B) Excretion

(C) Deamination

(D) Egestion

Q:46: Uric acid is the chief nitrogenous waste material in the excretory system of

(A) Reptiles

(B) Birds

(C) Insects

(D) All of these

Q:47: Which of the following is not structure of kidney

(A) Cortex

(B) Medulla

(C) Pelvis

(D) Ureth

Q:48: In mammalian kidney, the pyramids are seen in

(A) Cortex

(B) Medulla

(C) Pelvis

(D) Hilus

Q:49: The number of nephrons in ONE kidney of man is

(A) 4 million

(B) 2 million

(C) 8 million

(D) 1 million

Q:50: ADH increases __________ of ___________ from the collecting duct.

(A) Absorption, sodium

(B) Diffusion, chlorine

(C) Absorption, water

(D) Diffusion, Ammonia

Q:51: Two counter-current systems are formed in the kidney by the

(A) Henle’s loop and PCT

(B) Henle’s loop and DCT

(C) Henle’s loop and Collecting duct

(D) Henle’s loop and Vasa rectae

Q:52: Cholesterol is excreted in the

(A) Sebum

(B) Bile

(C) Sweat

(D) Both A and B

Q:53: Malpighian body is composed of

(A) Bowman’s capsule only

(B) Glomerulus only

(C) Bowman’s capsule & Glomerulus

(D) Henle’s loop and Vasa rectae

Q:54: Daily urine output of man is

(A) 1-2 liters

(B) 1-3 liters

(C) 1-4 liters

(D) 1-5 liters

Q:55: Tubular structure which carries urine from bladder to outside

(A) Ureter

(B) Hilus

(C) Pelvis

(D) Urethra

Q:56: Ultrafiltration occurs in

(A) Bowman’s capsule

(B) Proximal convoluted tube

(C) Henle’s loop

(D) Distal convoluted tube

Q:57: The greater the demand of conserving water, the greater would be the number of

(A) Juxta-medullary nephrons

(B) Cortical nephrons

(C) Capillaries of glomerulus

(D) Both A and B

Q:58 : Each kidney is enclosed by a thin membranous covering called

(A) Peritonium

(B) Peritreme

(C) Perizonium

(D) All A, B and C

Q:59: pH of human urine is

(A) 7.4

(B) 3.5

(C) 5.00

(D) 8.00

Q:60: The hormone which increases the reabsorption of calcium ions in nephron is

(A) Aldosterone

(B) Parathormone

(C) Anti-diuretic

(D) Vasopression

Q:61: The process by which some poisonous substances are secreted from preitubular capillaries into nephric filtrate is termed as

(A) Tubular reabsorption

(B) Tubular secretion

(C) Counter-current exchange

(D) None of these

Q:62: It is a cyclic process of enzymatic reactions which operates in the liver cells as result of which urea is formed from ammonia, carbondioxide and NH2 group

(A) Ornithine cycle

(B) Citruline cycle

(C) Arginine cycle

(D) All of these

Q:63: Select the correct for nitrogenous wastes in this diagram

(A) "A" Urea "B" Ammonia "C" Uric acid

(B) "A" Uric acid "B" Ammonia "C" Urea

(C) "A" Ammonia "B" Urea "C" Uric acid

(D) "A" Ammonia "B" Uric acid "C" Urea

Q:64: Blood enters the kidney through a branch of the aorta called

(A) Afferent arteriole

(B) Renal artery

(C) Efferent arteriole

(D) Renal vein

Q:65: A capillary tuft from which fluid leaves the circulatory system.

(A) Bowman's capsule

(B) Proximal convoluted tube

(C) Glomerulus

(D) Loop of Henle

Q:66: In ectotherms and endotherms heat can be lost through

(A) Evaporation

(B) Radiation

(C) Convection

(D) All A, B and C

Q:67: About _______% of kidney stones are composed of Calcium oxalate or phosphate.

(A) 5%

(B) 20%

(C) 70%

(D) 90%

Q:68: About _______% of kidney stones are composed of Uric acid.

(A) 5%

(B) 20%

(C) 70%

(D) 90%

Q:69: Dialysis cleans the blood by

(A) An artificial kidney

(B) Filtering it within abdomen

(C) Removing glucose from blood

(D) Both A and B

Q:70: Haemodialysis means

(A) Removing the blood

(B) Cleaning the blood

(C) Diluting the blood

(D) All options are correct

Q:71: These are animals that produce metabolic heat at low rates and rely primarily on thermal conditions of their surroundings.

(A) Endotherms

(B) Heterotherms

(C) Ectotherms

(D) Both B and C

Q:72: These are animals capable of varying degrees of endothermic heat production, but they generally do not regulate body temperature within as narrow a range as endotherms.

(A) Ectotherms

(B) Poikilotherms

(C) Heterotherms

(D) None of these

Q:73: It is technique of breaking kidney stones inside kidneys, ureters, and urinary bladder

(A) Lithotrophy

(B) Lithography

(C) Lithotripsy

(D) All options are correct

Q:74: Mammals maintain their body temperature within a range of

(A) 25 C˚ to 35 C˚

(B) 30 C˚ to 40 C˚

(C) 36 C˚ to 43 C˚

(D) 36 C˚ to 38 C˚

Q:75: Birds maintain their body temperature within a range of

(A) 25 C˚ to 35 C˚

(B) 30 C˚ to 40 C˚

(C) 41 C˚ to 43 C˚

(D) 36 C˚ to 38 C˚

Q:76: Regulation of body temperature in homiotherms during high environmental temperature involve

(A) Vaso-dilation

(B) Lowering the hairs

(C) Reduction in sub-cutaneous fat

(D) All A, B and C

Q:77: Regulation of body temperature in homiotherms during cold environmental temperature involve

(A) Vaso-constriction

(B) Erection of hairs

(C) Increase in sub-cutaneous fat

(D) All A, B and C

Q:78: _____________ displace the set point of hypothalamus above the normal point of 37 C˚

(A) Pyrenins

(B) Pyridoxins

(C) Pyrogens

(D) All A, B and C

Q:79: An animal when taken into hot area looses heat by sweating and when to cold area increases muscular activity to produce more heat. The animal in this thought is

(A) Homiothermic

(B) Poikilothermic

(C) Ectothermic

(D) None of these

Q:80: Which cycle is shown in this diagram

(A) Ornithine cycle

(B) Urea cycle

(C) Urine cycle

(D) Both A and B

Answer Key:>

1. B
2. C
3. D
4. D
5. D
6. C
7. C
8. A
9. C
10. B
11. B
12. A
13. B
14. A
15. D
16. B
17. C
18. A
19. B
20. D
21. B
22. D
23. A
24. D
25. D
26. C
27. D
28. A
29. B
30. C
31. D
32. C
33. D
34. A
35. D
36. A
37. C
38. B
39. A
40. B
41. B
42. D
43. C
44. D
45. C
46. D
47. D
48. B
49. D
50. C
51. D
52. B
53. C
54. A
55. D
56. A
57. A
58. A
59. C
60. B
61. B
62. A
63. C
64. B
65. C
66. D
67. C
68. A
69. D
70. B
71. C
72. C
73. C
74. D
75. C
76. D
77. D
78. C
79. A
80. D