ICSE Class 6 Biology - Respiratory System - Test 3 (Advanced)
1. Alveoli are specially adapted for:
A. Digestion of food
B. Efficient gas exchange
C. Blood pumping
2. Oxygen enters blood from alveoli by:
A. Filtration
B. Pumping
C. Diffusion
3. Carbon dioxide leaves the body through:
A. Lungs
B. Stomach
C. Intestine
4. Cellular respiration mainly occurs in:
A. Blood vessels
B. Cells
C. Alveoli
5. Breathing rate is controlled by:
A. Bones
B. Skin
C. Body oxygen need
6. When diaphragm contracts, it causes:
A. Inhalation
B. Digestion
C. Excretion
7. Exhaled air contains:
A. More oxygen
B. More carbon dioxide
C. No gases
8. The trachea is kept open by:
A. Muscles
B. Bones
C. Cartilage rings
9. Air becomes warm and moist in the:
A. Nose
B. Heart
C. Liver
10. Bronchi are:
A. Blood vessels
B. Air passages to lungs
C. Digestive organs
11. The main product of respiration is:
A. Food
B. Oxygen
C. Energy
12. Alveoli are surrounded by:
A. Capillaries
B. Bones
C. Skin cells
13. Oxygen is essential for:
A. Digestion of food in stomach
B. Cellular respiration
C. Bone formation
14. Breathing is mostly:
A. Digestive
B. Circulatory
C. Involuntary process
15. The respiratory system helps in:
A. Gas exchange
B. Food digestion
C. Bone growth
16. Energy is released when oxygen combines with:
A. Water
B. Food
C. Carbon dioxide
17. Respiration is essential for:
A. Only humans
B. Only animals
C. All living beings
18. Gas exchange means:
A. Oxygen in, carbon dioxide out
B. Food digestion
C. Water absorption
19. Healthy breathing ensures:
A. Food storage
B. Oxygen supply
C. Bone growth only
20. Without respiration, cells cannot:
A. Digest food
B. Store water
C. Release energy