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Excitation-contraction coupling

Explain what is meant by the term excitation-contraction coupling?

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Excitation-Contraction Coupling

The contraction of a muscle fiber is linked to its neural excitation. In other words, a neuron synapses with a muscle fiber at a neuromuscular junction (NMJ). When the neurons release acetylcholine (ACh), the neurotransmitter crosses the synapse and binds to ACh receptors on the membrane of the muscle fiber. ...

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Excitation-contraction coupling is explained.