Question

In muscle contraction, calcium acts to what?

Answer 1

During muscle contraction, high concentrations of calcium are required to displace troponin and reveal the active site at which myosin binds to for the power stroke.

Step-by-step explanation:

Answer 2

As in vertebrate muscles, calcium ions act as the initiator of contraction. The difference is that the component that binds calcium ions in the molluscan muscle is myosin rather than a component of the actin-containing thin filaments.