The Sliding Mechanism of Myofilaments Works When ________

Question

The sliding mechanism of myofilaments works when ________.
A) the thick filaments detach from the muscle tendon
B) the myosin heads of the thick filaments bind to active sites on the actin molecules of the thin filaments
C) the myosin heads pivot away from the M line toward the Z lines
D) the troponin-tropomyosin complex interacts with the actin molecules
E) calcium ions bind to active sites on the actin molecules of the thin filaments

Accepted Answer

The sliding mechanism of myofilaments works when the myosin heads of the thick filaments bind to active sites on the actin molecules of the thin filaments, causing the thin filaments to slide past the thick filaments and resulting in muscle contraction.