Motor units that control skeletal muscles involved with fine motor movements (eye muscles or the hands)have ________ muscle fibers than motor units that control more gross movements (gastrocnemius muscle of the lower leg).
A) more
B) fewer
C) the same number of

Question

Quizplus · Accepted Answer

Motor units involved with fine motor movements have fewer muscle fibers than motor units involved with gross movements. This is because finer movements require more precise control and coordination of muscle fibers. Having fewer muscle fibers per unit allows for more precise control over each individual fiber.

Motor Units That Control Skeletal Muscles Involved with Fine Motor