The function of respiratory passage, Cilia is to keep the airways clear of:
Correct answer: C. Dust
- A. Carbon dioxide
- B. Oxygen
- C. Dust
- D. Carbon Monoxide
Explanation
Goblet cells produce mucus that traps the dust particles; this mucus is then beaten by cilia. Cilia keeps airways clear of the dust particles by their constant ciliary movement. Cilia has no role to play in the removal of gases like oxygen, carbon dioxide, and carbon monoxide.
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About Respiration
The human respiratory system includes the air passages, lungs, alveoli and breathing muscles, while gaseous exchange explains how oxygen enters blood and carbon dioxide leaves it by diffusion. The effects of smoking include damage to cilia and alveoli, reduced gas exchange, chronic bronchitis, emphysema and increased risk of lung cancer.
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