The basis for muscle contraction is the
A) rotation of myosin fibers around actin fibers.
B) expansion of the sarcomere.
C) sliding of myosin and actin fibers past each other.
D) movement of the Z discs away from each other.

Question

Quizplus · Accepted Answer

Muscle contraction occurs as a result of the sliding of myosin and actin fibers past each other. This sliding is facilitated by the interaction of the myosin heads with the actin filaments, which causes the actin filaments to slide toward the center of the sarcomere, ultimately resulting in a shortening of the muscle fiber.

The Basis for Muscle Contraction Is the