Question

What contributes to the partial pressure of Oxygen $\left(PP{O}_2\right)$ in blood?

• A. Physically dissolved oxygen
• B. Oxygen bound to hemoglobin
• C. Both of A and B
• D. None of the above

Answer 1

The correct option is A

Physically dissolved oxygen

Oxygen bound to the hemoglobin does not contribute to $PP{O}_2$ in blood plasma. Only the physically dissolved oxygen contributes to the $PP{O}_2$. This facilitates transport of large amount of oxygen using hemoglobin.