What enzyme is needed to start the cross bridging process?
A. creatine phosphatase
C. myosin ATPase
Sickle-cell anemia can be treated with the drug hydroxyurea which stimulates
A.production of hemoglobin gamma chains.
B.destruction of hemoglobin beta chains.
C.production of hemoglobin alpha chains.
D.destruction of hemoglobin S.
Development of the mammary gland during gestation
A.is inhibited by estrogens.
B.is stimulated by estrogens.
C.is elevated when dopamine is given to pregnant women.
D.requires the permissive effects of insulin, testosterone, and cortisol.