A decrease of blood pH from 7.4 to 7.2 causes hemoglobin to ________.

Question

Quizplus · Accepted Answer

A decrease in blood pH from 7.4 to 7.2 indicates an increase in acidity (more H⁺ ions) that can cause hemoglobin to unload more oxygen molecules to the tissues and organs that need more oxygen. This shift in oxygen binding affinity of hemoglobin is known as the Bohr effect. As a result, hemoglobin gives up more of its oxygen molecules to counteract the effects of acidosis. Thus, the correct choice is D.

A Decrease of Blood PH from 7