What is the effect of an increased concentration of calcium ion in the sarcoplasm?
A) Actin binding sites become exposed.
B) Myosin binding sites become exposed.
C) Troponin binding sites become exposed.
D) Actin and myosin become unable to accomplish contraction.

Question

Quizplus · Accepted Answer

An increased concentration of calcium ions in the sarcoplasm leads to the binding of calcium to troponin, which causes a conformational change that moves tropomyosin away from actin's myosin-binding sites, thereby exposing them and allowing for muscle contraction.

What Is the Effect of an Increased Concentration of Calcium