Which of the following statements is FALSE?
A) When muscles contract, the actin myofilaments are pulled towards the M-lines (the center), thus decreasing the overall sarcomere length.
B) During muscle contraction, the actual length of the actin and myosin molecules changes.
C) The sarcolemma is a specialized plasma membrane of a muscle cell.
D) A muscle cell is also called a muscle fiber.
E) Normally, skeletal muscle fibers do not contract unless they are stimulated by motor neurons.

Question

Quizplus · Accepted Answer

During muscle contraction, the actual length of the actin and myosin molecules does not change. Instead, the sliding filament theory states that the actin and myosin filaments slide past each other, causing the sarcomere to shorten.

Which of the Following Statements Is FALSE