In Striated Muscle, Phosphate is Released from the Myosin Head

Question

In striated muscle, phosphate is released from the myosin head at the same instant that
A) the myosin head binds to actin.
B) the myosin head releases from actin.
C) the myosin head returns to the cocked position.
D) the myosin head starts the power stroke.

Accepted Answer

Phosphate is released from the myosin head during the power stroke, which is when the myosin head pivots and pulls the actin filament, leading to muscle contraction.