A single contraction of all the muscle fibers in a motor unit is known as ____.
A)a muscle twitch
B)tetanus
C)summation
D)relaxation coupling
E)isometric contraction

Question

Quizplus · Accepted Answer

A muscle twitch is a single contraction of all the muscle fibers in a motor unit. Tetanus refers to sustained muscle contraction, summation is the process of increasing the force of contraction by stimulating the muscle repeatedly before it has completely relaxed, relaxation coupling refers to the mechanism by which muscle fibers return to their resting state after contraction, and isometric contraction is when tension is generated in the muscle without any change in the length of the muscle.

A Single Contraction of All the Muscle Fibers in a Motor