When a myosin head binds to an actin molecule in order to contract a muscle, this is formed: ________.
A) myosin filament
B) actin filament
C) cross-bridge
D) troponin

Question

Quizplus · Accepted Answer

The formation of a cross-bridge between a myosin head and an actin molecule is necessary for muscle contraction. The myosin head binds to the actin filament to form the cross-bridge, which allows the myosin filament to pull the actin filament towards the center of the sarcomere. Troponin is a regulatory protein on the actin filament that helps control the binding of the myosin head to the actin molecule.

When a Myosin Head Binds to an Actin Molecule in Order