Gas exchange and breathing Quiz
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5 questions, one answer each
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1. Which structure divides to form the bronchioles?
- A. Trachea
- B. Alveoli
- C. Bronchi
- D. Diaphragm
2. Which gas is present at a higher percentage in exhaled air than in inhaled air?
- A. Oxygen
- B. Carbon dioxide
- C. Nitrogen
- D. Hydrogen
3. What does carbon monoxide in cigarette smoke do?
- A. Binds to haemoglobin, reducing oxygen carried
- B. Destroys cilia
- C. Causes lung cancer directly
- D. Increases the surface area of alveoli
4. When the stomata are open, which gas diffuses into a leaf for photosynthesis?
- A. Oxygen
- B. Water vapour
- C. Nitrogen
- D. Carbon dioxide
5. Which change happens in the chest during inhalation?
- A. Volume decreases and pressure increases
- B. Volume increases and pressure decreases
- C. Volume and pressure both increase
- D. Volume and pressure both decrease