Final answer:
A neuromuscular junction consists of one neuron and all the skeletal muscles it stimulates. Every skeletal muscle fiber in every skeletal muscle is innervated by a motor neuron at the neuromuscular junction.
Step-by-step explanation:
The statement is true. A neuromuscular junction consists of one neuron and all the skeletal muscles it stimulates.
This is the site where a motor neuron's terminal meets the muscle fiber, and it is where the muscle fiber first responds to signaling by the motor neuron.
Every skeletal muscle fiber in every skeletal muscle is innervated by a motor neuron at the neuromuscular junction.
Excitation signals from the neuron are the only way to functionally activate the fiber to contract.