Which statement about the structure of skeletal muscle is true?
A) The light bands of the sarcomere are the regions where actin and myosin filaments overlap.
B) When a muscle contracts, the A bands of the sarcomere lengthen.
C) The myosin filaments are anchored in the Z lines.
D) When a muscle contracts, the H zone of the sarcomere shortens.
E) The sarcoplasm of the muscle cell is contained within the sarcoplasmic reticulum.

Question

Quizplus · Accepted Answer

During muscle contraction, the H zone of the sarcomere (the region between the ends of the actin filaments) shortens as the myosin filaments pull the actin filaments towards the center of the sarcomere.

Which Statement About the Structure of Skeletal Muscle Is True