[Campbell Biology P.1175] According to the sliding-filament model, what is the immediate cons... | Practice Question

According to the sliding-filament model, what is the immediate consequence when a new ATP molecule binds to the myosin head during muscle contraction?

  • A: The myosin head hydrolyzes ATP, leading to its high-energy form.
  • B: The myosin head forms a cross-bridge with actin.
  • C: The cross-bridge between myosin and actin is disrupted, and the myosin head is released.
  • D: The myosin head pulls the thin filament toward the center of the sarcomere.

Explanation

The text states: 'When a new ATP molecule binds to the myosin head, the cross-bridge is disrupted, releasing the myosin head from the actin filament.' This is the immediate consequence.