In emphysema, the alveoli become enlarged due to deterioration of the alveolar walls. How does this lead to a lack of oxygen?
A) The surface area for exchange of oxygen is reduced due to the breakdown of the walls and increased size of the alveoli.
B) The alveolar walls thicken, making exchange more difficult.
C) The enlarged alveoli put pressure on the capillaries in the lung, causing them to break down.
D) The alveoli walls become impermeable to oxygen as they enlarge.

Question

Quizplus · Accepted Answer

Enlargement of the alveoli leads to a reduction in the surface area available for gas exchange, as the alveolar walls break down and are unable to effectively facilitate the diffusion of oxygen from the lungs to the bloodstream.

In Emphysema, the Alveoli Become Enlarged Due to Deterioration of the Alveolar