A single muscle contraction lasting a fraction of a second is a
A)myogram.
B)muscle twitch.
C)motor unit.
D)tetanic contraction.

Question

Quizplus · Accepted Answer

A muscle twitch is a single muscle contraction that lasts only a fraction of a second and is caused by a single action potential from a motor neuron. A myogram is a graphical representation of the electrical activity of a muscle, a motor unit is a motor neuron and all the muscle fibers it innervates, and a tetanic contraction is a sustained muscle contraction caused by rapidly repeated stimuli.

A Single Muscle Contraction Lasting a Fraction of a Second