Extrafusal muscle fibers that surround a muscle spindle and resist excessive muscle stretching are innervated by
A) α efferent neurons.
B) secondary sensory endings.
C) primary sensory endings.
D) γ efferent neurons.

Question

Quizplus · Accepted Answer

Extrafusal muscle fibers are innervated by α efferent neurons, which are responsible for generating the force of muscle contraction and resisting excessive stretching.

Extrafusal Muscle Fibers That Surround a Muscle Spindle and Resist