Calcium Ions Regulate Contraction of Smooth Muscle Cells by Binding

Question

Calcium ions regulate contraction of smooth muscle cells by binding to
A)troponin.
B)tropomyosin.
C)actin.
D)myosin.
E)calmodulin.

Accepted Answer

Calcium ions regulate contraction of smooth muscle cells by binding to calmodulin, which then activates myosin light chain kinase, ultimately leading to contraction.