The Movement of Actin and Myosin Fibers in a Muscle

Multiple Choice

The movement of actin and myosin fibers in a muscle contraction contains all of the following steps EXCEPT

A) the myosin head attaches to the actin filament.
B) the globular myosin head detaches from the actin filament.
C) myosin rolls up from one end, forming a ball.
D) the myosin head returns to its original conformation.