Compared to normal levels, a shift in the HbO₂ curve to the right has which of the following effects?
I .The affinity of Hb for oxygen decreases.
II.The Hb saturation for a given PO₂ falls.
III.The Hb saturation for a given PO₂ rises.

Question

Quizplus · Accepted Answer

A shift in the HbO₂ curve to the right means that the hemoglobin has a decreased affinity for oxygen, leading to a lower saturation for a given partial pressure of oxygen (PO2). Therefore, both statements I and II are correct. Statement III is incorrect as a right shift in the curve indicates a decrease in hemoglobin saturation at a given PO2, not an increase.

Compared to Normal Levels, a Shift in the HbO2 Curve

Compared to Normal Levels, a Shift in the HbO₂ Curve