ICSE Class 6 Biology - Circulatory System - Test 5 (Comprehensive)
1. Iron in food is important because it helps in:
A. Digestion of food
B. Formation of hemoglobin
C. Breathing air
2. Anemia occurs when there is:
A. Less hemoglobin
B. More oxygen
C. Faster heartbeat only
3. A balanced diet helps the circulatory system by:
A. Stopping blood flow
B. Reducing heart size
C. Keeping blood healthy
4. Dehydration affects the body by:
A. Increasing blood amount
B. Reducing blood volume
C. Increasing oxygen production
5. Blood donation is useful because it:
A. Saves lives
B. Stops heartbeat
C. Reduces breathing rate
6. In case of bleeding, the first step is to:
A. Wash with oil
B. Ignore the wound
C. Apply pressure
7. Blood clotting is important because it:
A. Increases oxygen
B. Stops bleeding
C. Produces food
8. Pulse can be measured at the:
A. Wrist
B. Stomach
C. Foot only
9. A stethoscope is used to hear:
A. Breathing only
B. Heartbeat
C. Digestion sounds
10. At high altitude, blood carries:
A. More oxygen
B. No oxygen
C. Less oxygen
11. Exercise helps the heart by making it:
A. Stronger
B. Smaller
C. Stop working
12. A lower resting pulse means:
A. Weak heart
B. Efficient heart
C. No circulation
13. During infection, white blood cells:
A. Decrease
B. Stop working
C. Increase
14. Plasma helps in:
A. Temperature regulation
B. Bone formation
C. Digestion only
15. Healthy blood vessels help in:
A. Stopping blood flow
B. Smooth circulation
C. Producing food
16. Eating junk food regularly can:
A. Improve blood flow
B. Strengthen heart always
C. Harm circulation health
17. Smoking affects blood by:
A. Reducing oxygen supply
B. Increasing digestion
C. Strengthening RBCs
18. Athletes have:
A. Weak hearts
B. Strong hearts
C. No blood flow
19. Circulation helps remove:
A. Oxygen
B. Food
C. Waste materials
20. The circulatory system is essential because it:
A. Supports life processes
B. Stops breathing
C. Stops digestion