Which of the following changes take place as the muscle contracts?
A)The Z lines get closer together.
B)The H zones get smaller.
C)The I band gets smaller.
D)The A band gets smaller.
E)A,B,and C are correct.

Question

Quizplus · Accepted Answer

During muscle contraction, the Z lines move closer together, the H zones and I bands get smaller, while the A band remains the same length. This is because the actin filaments slide over the myosin filaments, shortening the sarcomere without changing the length of the myosin filaments themselves.

Which of the Following Changes Take Place as the Muscle