When the muscle looks "at rest," the ATP has already transferred its energy to the actin fiber.

Question

Quizplus · Accepted Answer

When the muscle looks "at rest," the ATP is still bound to the myosin head and has not yet transferred its energy to the actin fiber. It is during the contraction process when the ATP is hydrolyzed and its energy is used to move the actin filament along the myosin filament, eventually leading to muscle shortening.

When the Muscle Looks "At Rest," the ATP Has Already