The most important factor that determines the extent to which hemoglobin is saturated with oxygen is the blood $\mathrm { P } _ { \mathrm { O } _ { 2 } }$ .

Question

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The partial pressure of oxygen (PO2) is the most important factor that determines the extent to which hemoglobin is saturated with oxygen. When the PO2 is high, hemoglobin binds more oxygen molecules, and when the PO2 is low, hemoglobin releases oxygen molecules.

The Most Important Factor That Determines the Extent to Which PO2\mathrm { P } _ { \mathrm { O } _ { 2 } }PO2​​

The Most Important Factor That Determines the Extent to Which $\mathrm { P } _ { \mathrm { O } _ { 2 } }$