Sports Biomechanics
Excitation-contraction coupling is the physiological process that connects the electrical stimulation of a muscle fiber to its contraction. This process begins when a motor neuron releases acetylcholine, triggering an action potential in the muscle fiber. The action potential travels along the sarcolemma and into the T-tubules, leading to the release of calcium ions from the sarcoplasmic reticulum, which then initiates the interaction between actin and myosin filaments, ultimately resulting in muscle contraction.
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