Arterial $\mathrm { P } _ { \mathrm { O } _ { 2 } }$ remains normal or may even increase slightly during exercise despite the fact that O? consumption by the tissues is greatly increased.

Question

Quizplus · Accepted Answer

During exercise, the increased demand for oxygen by the tissues is met by an increase in pulmonary ventilation, which helps to maintain normal arterial $\mathrm{P}_{\mathrm{O}_2}$ levels. Additionally, there is increased oxygen extraction by the tissues, which means that despite the higher demand, arterial $\mathrm{P}_{\mathrm{O}_2}$ levels may not necessarily decrease. In some cases, it may even increase slightly due to factors such as increased cardiac output and improved oxygen delivery to the tissues.

Arterial PO2\mathrm { P } _ { \mathrm { O } _ { 2 } }PO2​​

Arterial $\mathrm { P } _ { \mathrm { O } _ { 2 } }$