Each skeletal muscle fiber is controlled by a motor neuron at a single

Neuromuscular joint

Explanation:

At the neuromuscular joint, an impulse is transmitted through the synaptic cleft. When an impulse reaches the synaptic knob, it stimulates the vesicles to move towards the presynaptic membrane releasing the acetylcholine. A resulting action potential is transmitted as a nerve impulse along the neuron.

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