Take 5 chapter-wise practice tests plus 1 full module test on Excretory Products and their Elimination for NEET with +4/-1 scoring, answer review, and concise explanations.
Attempt 5 focused chapter practice tests and 1 module test built from reframed NEET-style excretory chapter questions from readable zoology module material.
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1. The chief nitrogenous waste in humans is:
Explanation: Humans are ureotelic, so urea is their main nitrogenous waste.
2. Animals excreting ammonia are called:
Explanation: Ammonotelic animals excrete ammonia directly.
3. Birds are mainly:
Explanation: Birds excrete uric acid to conserve water.
4. Mammals are generally:
Explanation: Mammals convert ammonia to urea for safer transport and excretion.
5. Ammonia is highly toxic and therefore requires:
Explanation: That is why ammonotelism is common in aquatic animals.
6. Uric acid is least toxic and therefore useful in animals needing:
Explanation: Uric acid is excreted with minimum water loss.
7. The amino acid metabolism waste first formed is mainly:
Explanation: Nitrogen metabolism initially yields ammonia.
8. A ureotelic animal among the following is:
Explanation: Adult amphibians are generally ureotelic.
9. Most aquatic bony fishes are:
Explanation: Water availability allows direct ammonia elimination.
10. Which pair is correctly matched?
Explanation: Birds excrete uric acid, while humans mainly excrete urea.
11. Excretion mainly removes:
Explanation: Excretion deals with metabolic by-products, not undigested residues.
12. Ammonotelism is favored in:
Explanation: The toxic ammonia can be diluted rapidly in water.
13. Uric acid excretion is common in:
Explanation: It minimizes water loss and is adaptive on land.
14. Creatinine is associated mainly with metabolism of:
Explanation: Creatinine is a metabolic waste from muscle activity.
15. The major excretory organ of humans is:
Explanation: Kidneys are the principal organs for urine formation.
16. Which statement is correct?
Explanation: Toxicity and solubility explain excretory strategies.
17. Urea is formed in the:
Explanation: The urea cycle occurs in the liver.
18. Human urine normally contains the highest nitrogenous fraction as:
Explanation: Urea is the dominant nitrogenous component of normal urine.
19. Which one is not a nitrogenous waste?
Explanation: Bile pigments are excretory products, but not nitrogenous wastes.
20. The best summary is:
Explanation: This explains the diversity of excretory strategies.
21. Revision Booster 1. Recheck this Excretory Products and their Elimination concept with a fresh option order. The chief nitrogenous waste in humans is:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Humans are ureotelic, so urea is their main nitrogenous waste.
22. Revision Booster 2. Recheck this Excretory Products and their Elimination concept with a fresh option order. Animals excreting ammonia are called:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Ammonotelic animals excrete ammonia directly.
23. Revision Booster 3. Recheck this Excretory Products and their Elimination concept with a fresh option order. Birds are mainly:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Birds excrete uric acid to conserve water.
24. Revision Booster 4. Recheck this Excretory Products and their Elimination concept with a fresh option order. Mammals are generally:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Mammals convert ammonia to urea for safer transport and excretion.
25. Revision Booster 5. Recheck this Excretory Products and their Elimination concept with a fresh option order. Ammonia is highly toxic and therefore requires:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. That is why ammonotelism is common in aquatic animals.
26. The human excretory system consists of kidneys, ureters, urinary bladder, and:
Explanation: Urine passes through urethra to the exterior.
27. Human kidneys are located in the:
Explanation: They lie retroperitoneally in the upper abdomen.
28. The concave medial side of kidney bears the:
Explanation: Renal artery, vein, and ureter pass through the hilum.
29. The outer region of kidney is:
Explanation: Kidney has outer cortex and inner medulla.
30. The inner region of kidney is:
Explanation: The medulla contains renal pyramids.
31. Renal medulla is divided into conical masses called:
Explanation: These project toward the pelvis.
32. The apex of a renal pyramid is the:
Explanation: Papilla projects into minor calyx.
33. Urine from papilla first enters:
Explanation: Minor calyces collect urine from papillae.
34. The funnel-shaped structure receiving urine from calyces is:
Explanation: Renal pelvis continues as ureter.
35. Ureter carries urine from:
Explanation: Each kidney drains into a ureter.
36. Urinary bladder mainly:
Explanation: The bladder is a muscular storage sac.
37. In males, urethra serves for passage of:
Explanation: Male urethra is common passage for both.
38. Blood enters kidney through:
Explanation: Each kidney receives blood from a renal artery.
39. Filtered blood leaves kidney through:
Explanation: Renal vein returns blood to systemic circulation.
40. Each kidney is enclosed by a fibrous:
Explanation: The fibrous capsule protects the kidney.
41. At the renal hilum, structures are arranged for entry/exit of:
Explanation: The hilum is the gateway to the kidney.
42. Expulsion of urine from urinary bladder is called:
Explanation: Micturition is urination.
43. Kidneys help maintain:
Explanation: They regulate osmolarity and electrolyte composition.
44. Which pair is correctly matched?
Explanation: The other structures have different roles.
45. Which statement is correct?
Explanation: That is the correct passage of urine.
46. Revision Booster 1. Recheck this Excretory Products and their Elimination concept with a fresh option order. The human excretory system consists of kidneys, ureters, urinary bladder, and:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Urine passes through urethra to the exterior.
47. Revision Booster 2. Recheck this Excretory Products and their Elimination concept with a fresh option order. Human kidneys are located in the:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. They lie retroperitoneally in the upper abdomen.
48. Revision Booster 3. Recheck this Excretory Products and their Elimination concept with a fresh option order. The concave medial side of kidney bears the:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Renal artery, vein, and ureter pass through the hilum.
49. Revision Booster 4. Recheck this Excretory Products and their Elimination concept with a fresh option order. The outer region of kidney is:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Kidney has outer cortex and inner medulla.
50. Revision Booster 5. Recheck this Excretory Products and their Elimination concept with a fresh option order. The inner region of kidney is:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. The medulla contains renal pyramids.
51. The structural and functional unit of kidney is:
Explanation: Each kidney contains a large number of nephrons.
52. The cup-shaped beginning of nephron is:
Explanation: Bowman's capsule surrounds the glomerulus.
53. The capillary tuft inside Bowman's capsule is:
Explanation: Glomerulus is the filtration site of nephron.
54. The first convoluted tubular segment after Bowman's capsule is:
Explanation: PCT is the proximal convoluted tubule.
55. The hairpin portion of nephron is:
Explanation: It dips into medulla and is crucial for concentration of urine.
56. The tubule after ascending limb of loop is:
Explanation: DCT is distal convoluted tubule.
57. Collecting duct receives urine from:
Explanation: Several nephrons open into common collecting ducts.
58. The first step in urine formation is:
Explanation: Blood plasma is filtered at glomerulus.
59. Ultrafiltration occurs in:
Explanation: Pressure filtration in the renal corpuscle forms filtrate.
60. The glomerular filtrate normally lacks:
Explanation: The filtration barrier retains cells and large proteins.
61. Maximum selective reabsorption occurs in:
Explanation: PCT reabsorbs much of water, glucose, amino acids, and salts.
62. The descending limb of loop of Henle is more permeable mainly to:
Explanation: It allows water movement out, concentrating the filtrate.
63. The ascending limb of loop of Henle is relatively impermeable to:
Explanation: This helps establish medullary osmotic gradient.
64. Tubular secretion mainly adds certain substances into filtrate from:
Explanation: Some ions and wastes are secreted from blood into tubules.
65. Under normal conditions, glucose in filtrate is:
Explanation: Glucose is normally reabsorbed in PCT.
66. Why can loop of Henle help concentrate urine?
Explanation: Counter-current arrangement is crucial here.
67. Nephrons with long loops of Henle extending deep into medulla are:
Explanation: They are important for production of concentrated urine.
68. Most human nephrons are:
Explanation: Cortical nephrons are more numerous than juxtamedullary ones.
69. Which pair is correctly matched?
Explanation: The other structures have different functions.
70. The best summary is:
Explanation: Urine formation is a multi-step nephron process.
71. Revision Booster 1. Recheck this Excretory Products and their Elimination concept with a fresh option order. The structural and functional unit of kidney is:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Each kidney contains a large number of nephrons.
72. Revision Booster 2. Recheck this Excretory Products and their Elimination concept with a fresh option order. The cup-shaped beginning of nephron is:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Bowman's capsule surrounds the glomerulus.
73. Revision Booster 3. Recheck this Excretory Products and their Elimination concept with a fresh option order. The capillary tuft inside Bowman's capsule is:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Glomerulus is the filtration site of nephron.
74. Revision Booster 4. Recheck this Excretory Products and their Elimination concept with a fresh option order. The first convoluted tubular segment after Bowman's capsule is:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. PCT is the proximal convoluted tubule.
75. Revision Booster 5. Recheck this Excretory Products and their Elimination concept with a fresh option order. The hairpin portion of nephron is:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. It dips into medulla and is crucial for concentration of urine.
76. Juxtaglomerular apparatus mainly helps in regulation of:
Explanation: JGA monitors pressure and filtrate composition.
77. Juxtaglomerular cells release:
Explanation: Renin initiates the renin-angiotensin system.
78. Renin-angiotensin-aldosterone system helps mainly in:
Explanation: RAAS supports blood volume and pressure regulation.
79. ADH increases:
Explanation: ADH acts on distal nephron and collecting ducts.
80. Aldosterone promotes:
Explanation: It also promotes potassium excretion.
81. Counter-current mechanism mainly operates in:
Explanation: This creates and maintains medullary osmotic gradient.
82. Vasa recta are associated mainly with:
Explanation: They run alongside deep loops of Henle.
83. Concentrated urine is produced when body needs to conserve:
Explanation: The kidneys vary urine concentration to regulate water balance.
84. Dilute urine is formed when:
Explanation: Lower ADH allows less water reabsorption and more dilute urine.
85. Which hormone acts directly on collecting duct for water conservation?
Explanation: ADH increases water permeability of collecting ducts.
86. Micturition is regulated partly by a reflex through:
Explanation: Stretch receptors in bladder trigger micturition reflex circuits.
87. If ADH secretion falls markedly, urine output will generally:
Explanation: Less water is reabsorbed, so more dilute urine is produced.
88. The osmotic gradient in renal medulla helps in:
Explanation: Gradient drives water movement under ADH influence.
89. Kidneys help maintain acid-base balance by regulating:
Explanation: Renal tubules contribute to pH regulation.
90. Atrial natriuretic factor generally promotes:
Explanation: ANF antagonizes volume-increasing pathways.
91. Why is JGA important?
Explanation: JGA senses and adjusts renal hemodynamics and RAAS response.
92. Which pair is correctly matched?
Explanation: ADH directly supports water reabsorption.
93. Selective reabsorption is called selective because:
Explanation: The kidneys are highly regulated rather than passive drains.
94. Which statement is correct?
Explanation: This is one of the key physiological ideas of the chapter.
95. The best summary is:
Explanation: Renal physiology extends far beyond simple waste removal.
96. Revision Booster 1. Recheck this Excretory Products and their Elimination concept with a fresh option order. Juxtaglomerular apparatus mainly helps in regulation of:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. JGA monitors pressure and filtrate composition.
97. Revision Booster 2. Recheck this Excretory Products and their Elimination concept with a fresh option order. Juxtaglomerular cells release:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Renin initiates the renin-angiotensin system.
98. Revision Booster 3. Recheck this Excretory Products and their Elimination concept with a fresh option order. Renin-angiotensin-aldosterone system helps mainly in:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. RAAS supports blood volume and pressure regulation.
99. Revision Booster 4. Recheck this Excretory Products and their Elimination concept with a fresh option order. ADH increases:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. ADH acts on distal nephron and collecting ducts.
100. Revision Booster 5. Recheck this Excretory Products and their Elimination concept with a fresh option order. Aldosterone promotes:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. It also promotes potassium excretion.
101. Accumulation of urea and other wastes in blood is called:
Explanation: Uremia reflects severe renal insufficiency.
102. Renal calculi are:
Explanation: Calculi are stones formed in urinary tract.
103. Inflammation of glomeruli is called:
Explanation: It affects glomerular filtration and kidney function.
104. When kidneys fail severely, one supportive procedure is:
Explanation: Dialysis removes wastes and excess salts from blood.
105. Hemodialysis works mainly by:
Explanation: Dialysis mimics selective waste removal from blood.
106. An artificial kidney helps remove mainly:
Explanation: Dialysis fluid and membrane help clear unwanted solutes.
107. Presence of glucose in urine may indicate:
Explanation: Excess blood glucose may exceed renal threshold.
108. Large proteins in urine generally suggest damage to:
Explanation: Proteins normally do not pass the glomerular filter in large amounts.
109. Markedly reduced urine output is termed:
Explanation: Oliguria indicates low urine output and may reflect renal dysfunction.
110. Excessive urine output may be called:
Explanation: Polyuria is common in diabetes mellitus and diabetes insipidus.
111. Blood in urine is termed:
Explanation: Hematuria indicates RBCs or blood contamination in urine.
112. Permanent treatment option for end-stage renal failure may include:
Explanation: Transplant can restore long-term renal function.
113. Renal calculi often cause:
Explanation: Stones may obstruct urine flow and cause severe pain.
114. If kidneys stop functioning adequately, blood urea tends to:
Explanation: Reduced excretion causes accumulation of urea in blood.
115. Which pair is correctly matched?
Explanation: The other options are incorrect.
116. Severe dehydration usually tends to make urine:
Explanation: Water conservation increases urine concentration.
117. Why must blood not mix directly with dialysis fluid?
Explanation: The membrane controls which solutes move.
118. Kidney failure affects homeostasis because kidneys normally regulate:
Explanation: Renal failure disrupts many vital balances at once.
119. Which statement is correct?
Explanation: Dialysis substitutes some kidney functions but does not rebuild the organ.
120. The strongest summary of this chapter is:
Explanation: The chapter integrates physiology, anatomy, and disorders.
121. Revision Booster 1. Recheck this Excretory Products and their Elimination concept with a fresh option order. Accumulation of urea and other wastes in blood is called:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Uremia reflects severe renal insufficiency.
122. Revision Booster 2. Recheck this Excretory Products and their Elimination concept with a fresh option order. Renal calculi are:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Calculi are stones formed in urinary tract.
123. Revision Booster 3. Recheck this Excretory Products and their Elimination concept with a fresh option order. Inflammation of glomeruli is called:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. It affects glomerular filtration and kidney function.
124. Revision Booster 4. Recheck this Excretory Products and their Elimination concept with a fresh option order. When kidneys fail severely, one supportive procedure is:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Dialysis removes wastes and excess salts from blood.
125. Revision Booster 5. Recheck this Excretory Products and their Elimination concept with a fresh option order. Hemodialysis works mainly by:
Explanation: Quick recall: this booster targets the same NEET concept in a new drill slot so the idea sticks under timed conditions. Dialysis mimics selective waste removal from blood.