Question

In the initiation of muscle contraction calcium ions bind to tropomyosin exposing active sites on actin for crossbridge formation
True or false

Answer 1

This statement is true. To be more specific, the calcium ions bind to the troponin, which are attached to the protein tropomyosin. The tropomyosin then to shifts to expose the actin filaments to which myosin heads need to bind to produce contraction.