Motor units that contain a relatively high number of muscle fibers are used
A)to lift heavy weights.
B)where precise control is needed.
C)to control muscles for posture.
D)to move the eyeballs.
E)both where precise control is needed and to move the eyeballs.

Question

Quizplus · Accepted Answer

Motor units that contain a relatively high number of muscle fibers are called high threshold motor units and they are used for activities that require lifting heavy weights. These motor units provide a lot of force and can generate a lot of tension, making them ideal for heavy lifting.

Motor Units That Contain a Relatively High Number of Muscle