An increase in the calcium ion level in the sarcoplasm starts the sliding of the thin filaments. When the level of calcium ions declines, sliding stops.

Question

Quizplus · Accepted Answer

This statement is true, as an increase in calcium ion level is necessary for the activation of the myosin-actin cross-bridges and consequent sliding of the thin filaments. When the calcium ion level decreases, the myosin-actin cross-bridges no longer form and the sliding of thin filaments stops.

An Increase in the Calcium Ion Level in the Sarcoplasm