VPY-0039
QUESTION
Which of the following shifts the Oxygen Hb dissociation curve to right?
OPTIONS
(A) When blood becomes slightly acidic
(B) Decreased CO2 concentration
(C) Decrease in blood temperature
(D) None of the above
ANSWER
(A) When blood becomes slightly acidic
EXPLANATION
When blood becomes slightly acidic is the correct option because increased hydrogen-ion concentration decreases hemoglobin's affinity for oxygen, shifting the oxyhemoglobin dissociation curve to the right and facilitating oxygen unloading to tissues. Decreased CO2 and decreased temperature shift the curve toward the left, while “None” is incorrect.