Calcium ions must bind to which protein to initiate muscle contraction?
A) Myosin
B) Actin
C) Tropomyosin
D) Troponin
E) Titin

Name: Calcium ions must bind to which protein to initiate muscle contraction? A) Myosin B) Actin C) Tropomyosin D) Troponin E) Titin
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Question

Quizplus · Accepted Answer

Calcium ions bind to troponin, which causes a conformational change in tropomyosin, exposing the active sites on actin for myosin to bind and initiate muscle contraction.

Calcium Ions Must Bind to Which Protein to Initiate Muscle