What type of motor neuron stimulates skeletal muscle fibers to contract by the excitation-contraction mechanism?
A)a-motor neuron
B)upper motor neuron
C)interneuron
D)y-motor neuron

Question

Quizplus · Accepted Answer

Only the A-motor neuron is responsible for stimulating skeletal muscle fibers to contract by the excitation-contraction mechanism. Upper motor neurons and interneurons play different roles in motor control, and y-motor neurons specifically control intrafusal muscle fibers in muscle spindles.

What Type of Motor Neuron Stimulates Skeletal Muscle Fibers to Contract