상황
The diagram traces the sequence of events at the neuromuscular junction when a nerve impulse arrives, leading to muscle fiber contraction. It includes ACh release, end-plate potential generation, threshold decision, action potential propagation, calcium-mediated excitation-contraction coupling, and relaxation.
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01
End-plate potential (EPP) reaches threshold to trigger muscle action potential
02
Insufficient depolarization leads to no response
Ideal for teaching the all-or-none principle in muscle physiology and the steps of excitation-contraction coupling.