GENERAL HISTOLOGY

Detailed explanation-1: -Each skeletal muscle fiber is innervated by a single motor axon. The same axon may also innervate other muscle fibers. All the fibers innervated by the same axon are called a motor unit.

Detailed explanation-2: -The Neuromuscular Junction Every skeletal muscle fiber in every skeletal muscle is innervated by a motor neuron at the NMJ. Excitation signals from the neuron are the only way to functionally activate the fiber to contract. Every skeletal muscle fiber is supplied by a motor neuron at the NMJ.