Which component of a muscle does the Ca++ combine with to allow a contraction to occur?

Question

Quizplus · Accepted Answer

Ca++ combines with the protein complex troponin in order to initiate a muscle contraction. Troponin is found on the actin filaments of the muscle fibers and is responsible for regulating the availability of myosin-binding sites on the actin filament. When Ca++ binds to troponin, it triggers a series of events that ultimately lead to the contraction of the muscle fiber.

Which Component of a Muscle Does the Ca++ Combine with to Allow