What does a P50 of 30 indicate?
a. a leftward shift of the curve meaning a decreased affinity of hemoglobin for O2
b. a rightward shift of the curve meaning a decreased affinity of hemoglobin for O2
c. a leftward shift of the curve meaning an increased affinity of hemoglobin for O2
d. a rightward shift of the curve meaning an increased affinity of hemoglobin for O2
b. a rightward shift of the curve meaning a decreased affinity of hemoglobin for O2
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