A single motor unit usually contains a motor neuron and
A) one muscle fiber.
B) both fast- and slow-twitch fibers.
C) either fast-twitch or slow-twitch fibers but not a mixture of the two types.
D) a muscle spindle.

Question

Quizplus · Accepted Answer

A single motor unit contains a motor neuron and the muscle fibers it innervates, which are typically of the same type, either fast-twitch or slow-twitch, but not a mixture of the two.

A Single Motor Unit Usually Contains a Motor Neuron and