Strenuous exercise lowers the blood pH, causing the curves for both hemoglobin and myoglobin to shift to the right. This shift results in
(A) an unloading of O2 at higher partial pressures
(B) an increase in the number of O2-binding sites
(C) the capture of more O2 by hemoglobin
(D) the capture of more O2 by myoglobin
Ans: (A) an unloading of O2 at higher partial pressures
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