Erythropoietin increases the number of red cells by all of the following mechanisms except:
a. Prolonging cell life span
b. Shortening cell division times
c. Allowing earlier cell egress from the bone marrow
d. Increasing the rate of hemoglobin synthesis
ANS: A
Erythropoietin has no effect on red cell life span. It does perform all the other functions listed.
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