Class 11 Biology Chapter 19: Excretory Products and Their Elimination – 100 MCQs with Answers
1. Basic excretory unit of human kidney is:
Answer: A) Nephron
2. Main nitrogenous waste in humans is:
Answer: B) Urea
3. Ornithine cycle operates in:
Answer: C) Liver
4. Largest amount of filtration occurs at:
Answer: C) Bowman’s capsule
5. Human kidney is:
Answer: C) Multilobed
6. Micturition is:
Answer: C) Release of urine
7. Glomerulus is a tuft of:
Answer: B) Capillaries
8. Antidiuretic hormone is secreted by:
Answer: B) Pituitary
9. Uricotelic animals excrete:
Answer: C) Uric acid
10. Filtration occurs under:
Answer: A) Pressure
11. Juxtaglomerular apparatus secretes:
Answer: A) Renin
12. The length of Henle’s loop is maximum in:
Answer: B) Desert mammals
13. Malpighian tubules are excretory organs in:
Answer: B) Insects
14. Urine is stored in:
Answer: C) Bladder
15. In hemodialysis, nitrogenous waste is removed by:
Answer: A) Diffusion
16. Creatinine is excreted as a waste from:
Answer: D) Muscle metabolism
17. Hypertonic urine is produced due to:
Answer: A) Longer loop of Henle
18. Main excretory organ in humans:
Answer: B) Kidney
19. The product of purine metabolism is:
Answer: B) Uric acid
20. Glucose is reabsorbed in:
Answer: B) Proximal tubule
21. In mammals, ureter emerges from:
Answer: C) Pelvis
22. Excretory organ in flatworms:
Answer: B) Flame cells
23. In man, maximum water is reabsorbed in:
Answer: A) Proximal tubule
24. Bowman’s capsule is found in:
Answer: B) Nephron
25. Uremia is:
Answer: C) High blood urea
26. Which reabsorbs by active transport?
Answer: A) Na+
27. Counter-current mechanism is seen in:
Answer: B) Henle’s loop
28. Afferent arteriole brings blood to:
Answer: B) Glomerulus
29. Glomerular filter is made of:
Answer: D) All above
30. Angiotensin II:
Answer: B) Raises blood pressure
31. The animals with kidneys as excretory organ:
Answer: B) Mammals
32. Uric acid excretion is the main form in:
Answer: C) Reptiles
33. ADH has its effect on:
Answer: C) Collecting duct
34. Convoluted part of nephron increases:
Answer: B) Surface area
35. Reabsorption of water occurs by:
Answer: A) Osmosis
36. Which is NOT excreted in urine?
Answer: A) Glucose
37. Normal urine is:
Answer: A) Acidic
38. In humans, kidney lies between vertebrae:
Answer: B) T12–L3
39. Which hormone decreases urine formation?
Answer: A) ADH
40. After removal of both kidneys, which will increase:
Answer: B) Urea
41. Renal medulla is made up of:
Answer: C) Pyramid
42. Largest nitrogenous excretion is:
Answer: B) Urine
43. Glomerular filtrate contains all except:
Answer: A) Plasma proteins
44. Number of nephrons in each human kidney:
Answer: A) 1 million
45. Peritubular capillaries surround:
Answer: D) All above
46. Ureotelism is an adaptation for:
Answer: B) Terrestrial life
47. Filtration pressure in kidney is about:
Answer: C) 10 mm Hg
48. Renin elevates blood pressure by:
Answer: A) Vasoconstriction
49. Excretion of excess salt in marine birds is by:
Answer: B) Salt glands
50. Vasa recta is seen around:
Answer: C) Henle’s loop
51. Mammalian nephron ends at:
Answer: B) DCT
52. Glomerular filtration rate (GFR) in a normal adult is about:
Answer: B) 120 ml/min
53. Fish excrete most of their nitrogenous wastes as:
Answer: B) NH3
54. First step of urine formation is:
Answer: B) Filtration
55. The efferent arteriole drains blood from:
Answer: B) Glomerulus
56. High concentration of ADH leads to:
Answer: B) More concentrated urine
57. Glycosuria means:
Answer: B) Glucose in urine
58. The descending limb of loop of Henle:
Answer: A) Permeable to water
59. Erythropoietin is formed in:
Answer: A) Kidney
60. Examples of ammonotelic animals are:
Answer: A) Fishes
61. Which of these is NOT an excretory organ?
Answer: C) Pancreas
62. Which hormone increases reabsorption of Na+?
Answer: A) Aldosterone
63. Obligatory reabsorption occurs in:
Answer: C) PCT
64. Dark yellow urine may be due to:
Answer: B) Dehydration
65. The process adding materials from blood to filtrate is:
Answer: B) Tubular secretion
66. Maximum pressure in glomerulus is due to:
Answer: A) Afferent arterioles wider
67. The skin excretes:
Answer: D) All above
68. Dialysis membrane is selective for:
Answer: B) Protein
69. Nephritis affects:
Answer: A) Kidney
70. The main process of excretion in amoeba:
Answer: B) Diffusion
71. Urea formation mainly takes place in:
Answer: A) Liver
72. Which animals possess protonephridia?
Answer: A) Flatworms
73. The pH of urine is about:
Answer: C) 6.0
74. Osmoregulation is:
Answer: B) Regulation of water and salt
75. Urine is carried to bladder by:
Answer: B) Ureter
76. Main nitrogenous waste in birds:
Answer: B) Uric acid
77. Insect excretory organ:
Answer: B) Malpighian tubules
78. Water balance hormone in humans:
Answer: A) ADH
79. Earthworm excretory organ is:
Answer: C) Nephridia
80. Excretion through skin occurs most in:
Answer: C) Frog
81. Nephridia are analogues of:
Answer: B) Kidneys
82. Which is a metabolic disorder of purine breakdown?
Answer: A) Gout
83. Increase in uric acid in blood signifies:
Answer: B) Gout
84. Which part of nephron is in cortex?
Answer: A) Bowman’s capsule
85. Tubular maximum for glucose is:
Answer: D) 180 mg/dL
86. High protein intake increases:
Answer: B) Urea
87. Renal calculi are:
Answer: A) Kidney stones
88. Hemodialysis is mainly used in:
Answer: B) Renal failure
89. The excretory product in cockroach is:
Answer: B) Uric acid
90. Ammonotelic excretion is seen in:
Answer: A) Tadpole larva
91. Ammonia is highly:
Answer: A) Toxic
92. Meiosis occurs in:
Answer: B) Gonads
93. Urinary bladder is made of:
Answer: A) Smooth muscle
94. Which is not normally found in urine?
Answer: B) Glucose
95. Major nitrogenous waste in aquatic animals:
Answer: C) Ammonia
96. If urine has protein, the condition is:
Answer: A) Proteinuria
97. Deamination occurs in:
Answer: C) Liver
98. A key function of kidney is:
Answer: B) Osmoregulation
99. Renal cortex contains:
Answer: B) Glomerulus
100. The volume of urine formed daily in a healthy adult:
Answer: C)