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

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Quizplus · Accepted Answer

The primary factor responsible for the normal increase in oxygen diffusion capacity during maximum exercise is the increased cardiac output, which leads to the recruitment of additional pulmonary capillaries. This recruitment allows for a greater surface area for oxygen exchange, enhancing the body's ability to uptake oxygen during periods of high demand.

What Primary Factor Is Responsible for the Normal Change in Oxygen