What is the result of ATP hydrolysis on the myosin head during muscle contraction?

• A. The myosin head pivots, pulling the actin filament towards the center of the sarcomere.
• B. The myosin head detaches from actin, allowing the muscle to relax.
• C. The myosin head binds to troponin, stabilizing the muscle structure.
• D. The myosin head releases calcium ions, initiating contraction.

Answer: (A)