During muscle contraction,
A) only the thin filaments shorten.
B) only the sarcomere shortens.
C) only the thick filaments shorten.
D) both the thick filaments and the sarcomere shorten.

Question

Quizplus · Accepted Answer

During muscle contraction, the sarcomere shortens as the thick and thin filaments slide past each other. Both the thick and thin filaments remain the same length but their overlapping pattern changes, causing the sarcomere to shorten.

During Muscle Contraction