How does vasodilation help when ventilation exceeds perfusion?
A) It reduces blood flow to the underventilated alveolus.
B) It increases O2 delivery to the overventilated alveolus.
C) It facilitates the expulsion of excess CO2.
D) It decreases the level of CO2 in the alveolus and the surrounding tissues.
E) It enables the dilation of bronchiolar smooth muscle.
Correct Answer:
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