The process of inspiration occurs as:
Correct answer: C. Active expansion of lungs takes place
- A. Lungs pull air inside
- B. Passive transport of air takes place
- C. Active expansion of lungs takes place
- D. Air is pushed inside
Explanation
During inspiration active expansion of air occurs and expiration is due to a passive contraction due to the elasticity of the lungs.
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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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