After it is released from the sarcoplasmic reticulum,the calcium combines with which protein?
A) Troponin
B) Actin
C) Myosin
D) Tropomyosin

Question

Quizplus · Accepted Answer

Calcium binds to troponin to initiate the process of muscle contraction. Troponin is a protein that is part of the thin filaments in the muscle fibers and is responsible for regulating the interaction between actin and myosin during muscle contraction. Calcium binding to troponin causes a conformational change that moves tropomyosin away from the myosin-binding site on actin, allowing myosin to bind to actin and generate force.

After It Is Released from the Sarcoplasmic Reticulum,the Calcium Combines