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One effect of cigarette smoking on gaseous exchange is the:

One effect of cigarette smoking on gaseous exchange is the:
Take Free Practice Test On 2026 JAMB UTME, Post UTME, WAEC SSCE, GCE, NECO SSCE
  • A Enlargement of alveolar surface area
  • B Increase in oxygen diffusion
  • C Reduction in mucus production
  • D Destruction of alveolar walls
Correct Answer: Option D
Explanation:
Harmful substances in cigarette smoke damage and destroy alveolar walls, reducing surface area available for gaseous exchange.

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