At the level of actin and myosin molecules, what is producing force when a skeletal muscle contracts?

Question

Quizplus · Accepted Answer

During muscle contraction, the myosin heads bind to actin filaments and undergo a conformational change, pulling the actin filaments towards the center of the sarcomere. This repeated binding and pulling of actin filaments by the myosin heads produces the force necessary for muscle contraction. The binding of calcium to troponin and the hydrolysis of ATP to ADP + Pi are important steps in the contraction process, but they do not directly produce force at the actin and myosin level.

At the Level of Actin and Myosin Molecules, What Is