What primary factor is responsible for the normal change in oxygen diffusion capacity during maximum exercise?
A) The increased cardiac output results in recuitment of pulmonary capillaries
B) The increased cardiac output results in increased ventilation/perfusion mismatch
C) Hyperventilation results in increased increased PaO₂s
D) Hyperventilation results in lowered H+ levels which shifts the oxygen dissociation curve

Question

Quizplus · Accepted Answer

During maximum exercise, the increased cardiac output results in recruitment of more pulmonary capillaries, which increases the surface area available for oxygen diffusion, leading to an increase in oxygen diffusion capacity.

What Primary Factor Is Responsible for the Normal Change in Oxygen