Action Potential:An electrical impulse that travels along the membrane of a neuron or muscle fiber, initiating activity such as muscle contraction.
Muscle Contraction:The process by which muscle fibers generate force and shorten or stiffen, producing movement or maintaining posture.
Excitation: Contraction Coupling - The physiological mechanism where an action potential triggers a myocyte (muscle cell) to contract, linking electrical stimulation with mechanical response in muscle tissue