In a muscle contraction, the sarcomere shortens when ____.
A)the myosin heads move in opposite directions
B)the myosin heads move towards 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 bind to actin filaments and pull them towards the center of the sarcomere, causing the sarcomere to shorten. This movement is towards each other, not in opposite directions.

In a Muscle Contraction, the Sarcomere Shortens When ____