The "normal" contractile fibers of the muscle are also called the
A) extrafusal fibers.
B) intrafusal fibers.
C) muscle spindle fibers.

Question

Quizplus · Accepted Answer

Extrafusal fibers are the typical contractile muscle fibers that are responsible for generating force and movement. Intrafusal fibers are specialized muscle fibers found within muscle spindles and are involved in muscle stretch reflexes. Muscle spindle fibers are another term for intrafusal fibers.

The "Normal" Contractile Fibers of the Muscle Are Also Called