At what exercise level would the alveolar-arterial PO₂ difference be expected to change?
A) It will increase when 40% or more of maximum oxygen consumption is reached
B) It will increase when 60% or more of maximum oxygen consumption is reached
C) It will start to decrease when 40% or more of maximum oxygen consumption is reached
D) It will start to decrease when 60% or more of maximum oxygen consumption is reached

Question

Quizplus · Accepted Answer

The alveolar-arterial PO₂ difference increases with exercise intensity, particularly when exceeding 40% of maximum oxygen consumption, due to factors like ventilation/perfusion mismatch and diffusion limitation.

At What Exercise Level Would the Alveolar-Arterial PO₂ Difference Be