Ca²⁺ or any other positive ion can enable cross-bridge cycling to begin.

Name: Ca²⁺ or any other positive ion can enable cross-bridge cycling to begin.
Brand: Quizplus
Rating: 4.9 (45 reviews)

Question

Quizplus · Accepted Answer

Cross-bridge cycling is initiated by the binding of calcium ions (Ca²⁺) to troponin, which then causes a conformational change in tropomyosin, exposing the myosin-binding sites on actin filaments. It is specifically the role of Ca²⁺, not just any positive ion, that enables this process in muscle contraction.

Ca²⁺ or Any Other Positive Ion Can Enable Cross-Bridge Cycling