ICSE Class 6 Biology - Respiratory System - Test 1 (Basic)
1. The main function of the respiratory system is:
A. Digestion of food
B. Breathing and gas exchange
C. Transport of food
2. The main organs of respiration are:
A. Lungs
B. Heart
C. Stomach
3. We breathe in oxygen mainly for:
A. Digestion
B. Growth of bones
C. Energy production
4. Air enters the body through the:
A. Nose
B. Stomach
C. Liver
5. The windpipe is also called:
A. Esophagus
B. Trachea
C. Bronchus muscle
6. The process of breathing includes:
A. Digestion and absorption
B. Circulation and transport
C. Inhalation and exhalation
7. During inhalation we take in:
A. Oxygen
B. Carbon dioxide
C. Nitrogen only
8. During exhalation we release:
A. Oxygen
B. Carbon dioxide
C. Water only
9. Gas exchange takes place in:
A. Heart
B. Stomach
C. Alveoli
10. The diaphragm helps in:
A. Breathing movement
B. Digestion
C. Blood clotting
11. Breathing becomes faster during exercise because:
A. Less oxygen is needed
B. More oxygen is needed
C. Food is not digested
12. Respiration in cells produces:
A. Water only
B. Food
C. Energy
13. Air is cleaned in the:
A. Nose
B. Stomach
C. Heart
14. Trachea divides into:
A. Veins
B. Bronchi
C. Arteries
15. The lungs are responsible for:
A. Pumping blood
B. Digestion
C. Gas exchange
16. The most important gas for respiration is:
A. Oxygen
B. Carbon dioxide
C. Hydrogen
17. Respiration mainly helps in:
A. Food storage
B. Energy release
C. Waste formation
18. Breathing is different from respiration because:
A. It is digestion
B. It is circulation
C. Respiration is chemical process
19. Oxygen is used by cells to:
A. Release energy
B. Make bones
C. Produce water only
20. A healthy respiratory system helps in:
A. Digestion of food
B. Proper breathing
C. Making blood