The regulation of smooth muscle contraction is mediated by the phosphorylation of which filaments in response to calcium binding to proteins

Question

Quizplus · Accepted Answer

Smooth muscle contraction is regulated by the phosphorylation of myosin filaments in response to calcium binding to calmodulin. This activates the myosin light chain kinase, which phosphorylates the myosin head, allowing it to bind to actin and initiate contraction. Calmodulin acts as a calcium-binding protein and is necessary for the activation of myosin light chain kinase. Actin and troponin are involved in regulating the contraction of skeletal and cardiac muscle, not smooth muscle.

The Regulation of Smooth Muscle Contraction Is Mediated by the Phosphorylation