ICSE Class 6 Biology - Respiratory System - Test 4 (Expert)
1. During inhalation, the diaphragm:
A. Moves upward
B. Moves downward
C. Becomes rigid and stops working
2. Breathing rate increases during exercise because:
A. Less oxygen is needed
B. No carbon dioxide is produced
C. More oxygen is required
3. Alveoli are adapted for efficient gas exchange because they have:
A. Large surface area
B. Thick walls
C. No blood supply
4. Gas exchange in alveoli occurs by:
A. Pumping
B. Diffusion
C. Digestion
5. The trachea is kept open by:
A. Muscles
B. Blood vessels
C. Cartilage rings
6. The main waste gas in respiration is:
A. Carbon dioxide
B. Oxygen
C. Glucose
7. The trachea divides into two:
A. Veins
B. Bronchi
C. Arteries
8. Cellular respiration takes place in:
A. Lungs
B. Stomach
C. Cells
9. Air entering the body is filtered in the:
A. Nose
B. Heart
C. Liver
10. When the diaphragm contracts, chest volume:
A. Decreases
B. Increases
C. Stops changing
11. Oxygen is important for:
A. Digestion
B. Blood clotting
C. Energy release
12. Exhaled air contains more:
A. Carbon dioxide
B. Oxygen
C. Nitrogen only
13. Breathing is controlled by:
A. Heart
B. Brain
C. Liver
14. Air becomes warm and moist in the:
A. Stomach
B. Heart
C. Nose
15. Alveoli are surrounded by:
A. Capillaries
B. Bones
C. Muscles
16. Oxygen is carried to body parts by:
A. Food pipe
B. Blood
C. Nerves
17. The main purpose of respiration is:
A. Food storage
B. Water absorption
C. Energy production
18. Breathing includes:
A. Inhalation and exhalation
B. Digestion only
C. Circulation only
19. Respiration is mainly a:
A. Physical process
B. Chemical process
C. Mechanical process
20. Healthy lungs are important for:
A. Digestion
B. Blood formation
C. Gas exchange