Which of the following is TRUE for a right shift in the oxygen-hemoglobin satura
ID: 3510660 • Letter: W
Question
Which of the following is TRUE for a right shift in the oxygen-hemoglobin saturation curve?
Question 2 options:
A)
Hemoglobin affinity for oxygen is increased.
B)
Oxygen loading onto hemoglobin is increased.
C)
It can be caused by an increase in blood pH.
D)
Hemoglobin is more saturated at a given PO2.
E)
It can be caused by an increase in PCO2.
A)
Hemoglobin affinity for oxygen is increased.
B)
Oxygen loading onto hemoglobin is increased.
C)
It can be caused by an increase in blood pH.
D)
Hemoglobin is more saturated at a given PO2.
E)
It can be caused by an increase in PCO2.
Explanation / Answer
The answer is: E. It can be caused by an increase in PCO2.
As PCO2 increases, the acidity of blood increases and pH of blood lowers so the curve shifts right.
The oxygen-hemoglobin saturation curve shifts right when hemoglobin affinity for oxygen is decreased, oxygen loading onto hemoglobin is decreased, blood pH decreases and when hemoglobin is less saturated at a given PO2.
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