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. 2019 Jul 31;4(7):12969–12977. doi: 10.1021/acsomega.9b00973

Figure 1.

Figure 1

The NMJ: influx of calcium (Ca2+) into the motor neuron leads to release of the neurotransmitter, ACh into the synaptic cleft. ACh binds to the receptors on skeletal muscle membranes opening up ion channels, leading to muscle depolarization and contraction.