Name the ion responsible for unmasking of active sites for myosin for cross-bridge activity during muscle contraction.
(a) Calcium
(b) Magnesium
(c) Sodium
(d) Potassium
Correct Option (a) Calcium Explanation:
Ca++ ions bind with Tpc unit of troponin which is responsible for masking of active sites for myosin through tropomyosin. The event initiates cross-bridge activity during muscle contraction mechanism.
