In a muscle contraction, the sarcomere shortens when ____.
A) the myosin heads move in opposite directions
B) the myosin heads move toward each other
C) the actin filaments move in opposite directions
D) the actin-myosin cross-bridge disconnects
E) ATP is formed from ADP and Pi

Question

Quizplus · Accepted Answer

During muscle contraction, the myosin heads pull the actin filaments toward the center of the sarcomere, causing the sarcomere to shorten. This movement involves the myosin heads moving toward each other as they pull the actin filaments inward.

In a Muscle Contraction, the Sarcomere Shortens When ____