To initiate a smooth muscle cell contraction, calcium enters the cell and binds to
A) troponin, which then activates myosin light-chain kinase.
B) calmodulin, which then binds to and activates myosin light-chain kinase.
C) a myosin head, which then activates calmodulin.
D) myosin light-chain kinase, which then hydrolyzes ATP.
E) a phosphatase, which then removes the tropomyosin blockade.
Correct Answer:
Verified
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