A consequence of alveolar hypoxia is:
A) reactive vasodilation.
B) local bronchoconstriction.
C) decreased respiratory rate.
D) pulmonary artery vasoconstriction.

Question

Quizplus · Accepted Answer

Alveolar hypoxia leads to pulmonary artery vasoconstriction, also known as hypoxic pulmonary vasoconstriction (HPV), as a compensatory mechanism to redirect blood flow to better oxygenated areas of the lungs. This can ultimately lead to pulmonary hypertension and right heart failure if prolonged or severe. Choices A and B are incorrect as they would worsen oxygenation, and Choice C is incorrect as the body would try to increase respiratory rate to compensate for the hypoxia.

A Consequence of Alveolar Hypoxia Is