In A(n) _______ Contraction, Muscle Fibers Shorten and Thicken

Question

In a(n) _______ contraction, muscle fibers shorten and thicken.
A) origination
B) isometric
C) fatigued
D) isotonic

Accepted Answer

In an isotonic contraction, muscle fibers shorten and thicken while also changing in length. This is opposed to isometric contractions, in which the muscle contracts but does not change in length, and origination or fatigued contractions, which are not types of contractions.