BI-1084
Alveoli and gas exchange
Biology · Secondary 3 · Medium · Alveoli and gas exchange
A person with pulmonary oedema has fluid filling many of the alveoli. How does this affect gas exchange?
- It increases the diffusion distance, so less oxygen enters the blood.
- It decreases the surface area of the trachea for gas exchange.
- It increases the number of capillaries around each alveolus.
- It makes the alveolar walls thinner, so diffusion is faster.
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