Class 10 The Excretory System Mock Test (ICSE)

Topics in The Excretory System

• Excretory organs
• Structure of the kidney
• Structure of a nephron
• Urine formation: ultrafiltration, reabsorption and secretion
• Osmoregulation

The Excretory System practice questions with answers

1. Q1Multiple choice·1 mark
   What is the funnel-shaped inner cavity of the kidney into which urine drains from the collecting ducts before passing into the ureter called?

   1. (a)Cortex
   2. (b)Pelvis
   3. (c)Renal pyramid
   4. (d)Medulla
   Show answer and step marks

   1. Correct option: (b) Pelvis+1

   Answer: (b)
2. Q2Multiple choice·1 mark
   Which of the following is considered an accessory excretory organ in humans that helps eliminate excess salt and water through sweat?

   1. (a)Ureter
   2. (b)Kidney
   3. (c)Skin
   4. (d)Urinary bladder
   Show answer and step marks

   1. Correct option: (c) Skin+1

   Answer: (c)
3. Q3Multiple choice·1 mark
   Which specific part of the nephron is primarily responsible for the process of ultrafiltration?

   1. (a)Distal convoluted tubule
   2. (b)Glomerulus
   3. (c)Collecting duct
   4. (d)Loop of Henle
   Show answer and step marks

   1. Correct option: (b) Glomerulus+1

   Answer: (b)
4. Q4Multiple choice·1 mark
   Which of the following accessory excretory organs primarily eliminates excess water, salt, and trace amounts of urea through sweat?

   1. (a)Skin
   2. (b)Liver
   3. (c)Kidneys
   4. (d)Lungs
   Show answer and step marks

   1. Correct option: (a) Skin+1

   Answer: (a)
5. Q5Multiple choice·1 mark
   Why is the efferent arteriole leaving the glomerulus narrower in diameter than the afferent arteriole entering it?

   1. (a)To decrease blood flow into the glomerulus
   2. (b)To slow down blood circulation through the entire renal tubule
   3. (c)To prevent the reabsorption of essential nutrients in the Bowman's capsule
   4. (d)To create a high hydrostatic pressure required for ultrafiltration
   Show answer and step marks

   1. Correct option: (d) To create a high hydrostatic pressure required for ultrafiltration+1

   Answer: (d)
6. Q6Multiple choice·1 mark
   Where does the maximum reabsorption of water, glucose, and amino acids take place in the nephron?

   1. (a)Collecting duct
   2. (b)Loop of Henle
   3. (c)Proximal convoluted tubule
   4. (d)Distal convoluted tubule
   Show answer and step marks

   1. Correct option: (c) Proximal convoluted tubule+1

   Answer: (c)

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