One motor neuron and all of the muscle fibers it innervates is called a
A)neuromuscular junction.
B)nerve.
C)motor unit.
D)ganglion.

Question

Quizplus · Accepted Answer

A motor unit is composed of a single motor neuron and its associated muscle fibers. When the motor neuron is activated, all of the muscle fibers it innervates contract together as a single unit, producing a coordinated muscle response. Neuromuscular junctions are specialized synapses between motor neurons and muscle fibers, but they are only one component of a motor unit. A nerve is a bundle of axons (including both sensory and motor neurons) that convey signals between the central nervous system and the rest of the body. Ganglia are clusters of nerve cell bodies located outside of the central nervous system. Neither of these structures specifically refers to a motor unit.

One Motor Neuron and All of the Muscle Fibers It