Arterial PO₂ remains normal or may even increase slightly during exercise, despite the fact that O₂ consumption by the tissues is greatly increased.

Question

Quizplus · Accepted Answer

During exercise, the increase in cardiac output and blood flow results in the maintenance or slight increase in arterial PO₂, allowing for adequate oxygen delivery to the tissues despite increased oxygen consumption. This is achieved through various mechanisms such as increased ventilation, capillary recruitment, and oxygen diffusion.

Arterial PO₂ Remains Normal or May Even Increase Slightly During