Question

How does the structure of the muscle contribute to arm movement?

A. The long muscle fibers transmit signals to the bones to make them move.
B. The parallel muscle fibers contract and pull the bones to produce movement.
C. The large surface areas of the muscle fibers absorb oxygen to help them move.
D. The tube-shaped muscle fibers transport oxygen and food needed to move the bones.

Answer 1

The structure of the muscle, specifically the parallel arrangement of muscle fibers, contributes to arm movement by contracting and pulling the bones.

Step-by-step explanation:

When muscles contract, they pull on bones and allow the body to move. The structure of the muscle, specifically the parallel arrangement of muscle fibers, contributes to arm movement. Option B is correct - the parallel muscle fibers contract and pull the bones to produce movement. The tendons, which are strong bands of connective tissue, connect the muscles to the bones and transmit the tension created by the muscle contraction to the bones, resulting in arm movement.