ANATOMY

Detailed explanation-1: -Myosin binds to actin at a binding site on the globular actin protein. Myosin has another binding site for ATP at which enzymatic activity hydrolyzes ATP to ADP, releasing an inorganic phosphate molecule and energy. ATP binding causes myosin to release actin, allowing actin and myosin to detach from each other.

Detailed explanation-2: -Posted August 5, 2021. Yes, muscle contraction requires ATP. ATP is in fact a critical requirement for muscle contraction because it breaks the myosin-actin cross-bridge, freeing the myosin for the next contraction. Without ATP, muscles would remain in their contracted state, rather than their relaxed state.

Detailed explanation-3: -ATP and Muscle Contraction The motion of muscle shortening occurs as myosin heads bind to actin and pull the actin inwards. This action requires energy, which is provided by ATP. Myosin binds to actin at a binding site on the globular actin protein.