when-an-alveolus-is-insufficiently-ventilated-what-happens-to-the-alveolar-parti

Question

When an alveolus is insufficiently ventilated, what happens to the alveolar partial pressure of oxygen (Po₂) and the pulmonary arteriole serving that alveolus?

Accepted Answer

Po₂ drops, and the arteriole constricts

Answer

Po₂ rises, and the arteriole constricts

Answer

Po₂ rises, and the arteriole dilates

Answer

Po₂ drops, and the arteriole dilates