Which of the following is an expression of the oxygen affinity of hemoglobin?
A)Oxyhemoglobin
B)Deoxyhemoglobin
C)PCO₂
D)P50

Question

Quizplus · Accepted Answer

P50 is a measure of the partial pressure of oxygen that results in 50% saturation of hemoglobin with oxygen. Therefore, P50 is an expression of the oxygen affinity of hemoglobin. Choices A and B refer to different states of hemoglobin (oxygenated and deoxygenated) and choice C refers to the partial pressure of carbon dioxide.

Which of the Following Is an Expression of the Oxygen