Question Paper
Class / Subject: Class 10 (ICSE) · Biology
Chapter: Chapter 9 — Chapter 9: The Excretory System
Time Allowed: 32 minutes
Max Marks: 16
1. What are nephrons? [1]
(A) Functional units of kidneys
(B) Functional units of the heart
(C) Functional units of the lungs
(D) Functional units of the liver
2. What are the three main steps of urine formation? [1]
(A) Filtration, reabsorption, secretion
(B) Only filtration
(C) Only secretion
(D) Only reabsorption
3. Where does filtration occur? [1]
(A) The glomerulus
(B) The tubule only
(C) The bladder
(D) The ureter
4. What forms in Bowman's capsule? [1]
(A) A filtrate
(B) Concentrated urine directly
(C) Blood cells
(D) Hormones
5. What happens during reabsorption? [1]
(A) Useful substances return to the blood
(B) Waste is added to the filtrate
(C) Nothing happens
(D) Blood cells are filtered out
6. What substances are typically reabsorbed? [1]
(A) Glucose and water
(B) Only waste products
(C) Only urea
(D) Nothing is reabsorbed
7. What else do kidneys regulate? [1]
(A) Blood pressure and pH balance
(B) Only body temperature
(C) Only digestion
(D) Nothing else
8. Why study the excretory system? [1]
(A) To understand waste removal and homeostasis
(B) No reason
(C) It's not useful
(D) Only for tests
9. What are nephrons? [1]
(A) Functional units of kidneys
(B) Functional units of the heart
(C) Functional units of the lungs
(D) Functional units of the liver
10. What are the three main steps of urine formation? [1]
(A) Filtration, reabsorption, secretion
(B) Only filtration
(C) Only secretion
(D) Only reabsorption
11. Where does filtration occur? [1]
(A) The glomerulus
(B) The tubule only
(C) The bladder
(D) The ureter
12. What forms in Bowman's capsule? [1]
(A) A filtrate
(B) Concentrated urine directly
(C) Blood cells
(D) Hormones
13. What happens during reabsorption? [1]
(A) Useful substances return to the blood
(B) Waste is added to the filtrate
(C) Nothing happens
(D) Blood cells are filtered out
14. What substances are typically reabsorbed? [1]
(A) Glucose and water
(B) Only waste products
(C) Only urea
(D) Nothing is reabsorbed
15. What else do kidneys regulate? [1]
(A) Blood pressure and pH balance
(B) Only body temperature
(C) Only digestion
(D) Nothing else
16. Why study the excretory system? [1]
(A) To understand waste removal and homeostasis
(B) No reason
(C) It's not useful
(D) Only for tests