Question

Motor units are a single motor nerve together with the group of muscle fibers it supplies.

True
False

Answer 1

A motor unit consists of a single motor neuron and the group of muscle fibers it innervates, and this statement is true.

Step-by-step explanation:

True

A motor unit consists of a single motor neuron and the group of muscle fibers it innervates. The motor neuron sends electrical signals to the muscle fibers, causing them to contract and produce movement.

For example, in the extraocular eye muscles, each motor neuron supplies only a small number of muscle fibers, allowing for precise control of eye movements. On the other hand, in large muscles like the thigh or back muscles, a single motor neuron supplies a large number of muscle fibers to generate more powerful movements.