MUSCLE PHYSIOLOGY

Detailed explanation-1: -As the myosin S1 segment binds and releases actin, it forms what are called cross bridges, which extend from the thick myosin filaments to the thin actin filaments. The contraction of myosin’s S1 region is called the power stroke (Figure 3).

Detailed explanation-2: -The cross-bridge cycling demonstrates the shortening of muscles due to the movement of the contractile proteins. The cross-bridge muscle contraction cycle is recognized in all types of muscles, such as cardiac, smooth, and skeletal muscles. This means that all muscle types contract by cross-bridge cycling.