A nurse in a Trinidad hospital observed that a patient with emphysema had difficulty breathing. Which feature of the alveoli is most affected in this condition?

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Question

A nurse in a Trinidad hospital observed that a patient with emphysema had difficulty breathing. Which feature of the alveoli is most affected in this condition?

Accepted Answer

Total surface area for gas exchange — Award 1 mark for recognising that emphysema destroys alveolar walls, reducing the surface area available for diffusion. A is incorrect — while walls may be affected, the primary issue is loss of surface area. C is incorrect — capillary number is not the main feature affected. D is incorrect — mucus production relates more to bronchitis than emphysema.

Answer

Thickness of alveolar walls

Answer

Amount of mucus in the bronchi

Answer

Number of capillaries surrounding alveoli

Answer

Total surface area for gas exchange

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