which of the following accurately describes the way in which a muscle moves?


A. No ATP is needed is the contraction of a muscle.

B. During contraction, cross-bridges pull the myosin to the center of the sarcomere.

C. Interaction and attachment between myosin and actin cause a muscle fiber to relax.

D. When actin filaments are pulled toward the center of the sacomere, the fiber shortens.