Arterial P_O2 remains normal or may even increase slightly during exercise, despite the fact that O₂ consumption by the tissues is greatly increased.

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This is because during exercise, the body increases blood flow to the working muscles, which helps to deliver oxygen and nutrients to support exercise performance. This increased blood flow can compensate for the increased oxygen demand by the muscles, thus maintaining or even slightly increasing arterial oxygen saturation levels.

Arterial PO2 Remains Normal or May Even Increase Slightly During

Arterial P_O2 Remains Normal or May Even Increase Slightly During