Question

lo 4.6. what affects the range of motion of a muscle?
the shape of the muscle fibers.
the number of muscle fibers.
the thickness of the muscle fibers.
the arrangement of muscle fibers.
the type of muscle fibers.

Explanation:

The arrangement of muscle fibers determines the direction and extent of muscle contraction, thus affecting the range of motion. Different arrangements like parallel, pennate etc. allow for different degrees and types of movement.

Answer:

The arrangement of muscle fibers.