In smooth muscle fibers, calcium binds to
A) calmodulin
B) myosin light chain kinase
C) tropomyosin
D) troponin

Name: In smooth muscle fibers, calcium binds to A) calmodulin B) myosin light chain kinase C) tropomyosin D) troponin
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Question

Quizplus · Accepted Answer

In smooth muscle fibers, calcium binds to calmodulin, which then activates myosin light chain kinase to phosphorylate myosin and initiate contraction. Tropomyosin and troponin are regulatory proteins found in skeletal and cardiac muscle fibers, not smooth muscle fibers.

In Smooth Muscle Fibers, Calcium Binds to