What is the role of ATP in the sliding filament theory?
A)Energizes the myosin cross-bridge
B)Releases calcium ions from the sarcoplasmic reticulum
C)Breaks the link between actin and myosin
D)Both energizes the myosin cross-bridge and breaks the link between actin and myosin.

Question

Quizplus · Accepted Answer

ATP plays two crucial roles in the sliding filament theory. Firstly, it energizes the myosin cross-bridge by binding to the myosin head, which causes a conformational change and prepares it for binding to actin. This energy is then used to create movement of the actin filament relative to the myosin filament. Secondly, ATP is required to break the link between actin and myosin at the completion of a muscle contraction cycle, allowing the myosin head to detach from actin and get ready for another cycle.

What Is the Role of ATP in the Sliding Filament