What is the main factor that determines the power of a muscle?
A) the length
B) the shape
C) the total number of muscle fibers (cells) available for contraction
D) the number of neurons innervating it

Question

Quizplus · Accepted Answer

The total number of muscle fibers (cells) available for contraction is the main factor that determines the power of a muscle. The more muscle fibers present, the greater the potential for force production during muscle contraction. Length and shape may play a role in the range of motion and directional force production, but they do not directly determine the power of the muscle. The number of neurons innervating the muscle may affect the precision of muscle control, but it does not determine the power of the muscle.

What Is the Main Factor That Determines the Power of a Muscle