Name the ion responsible for unmasking of active sites for myosin for cross-bridge activity during muscle contraction. - Biology MCQ Biology | ExamTest.live | ExamTest.live

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Name the ion responsible for unmasking of active sites for myosin for cross-bridge activity during muscle contraction.

A $Potassium$
B $Calcium$
C $Magnesium$
D $Sodium$

Solution & Step-by-step Explanation

During muscle contraction, Calcium (C a^{2 +}) ions released from the sarcoplasmic reticulum bind to troponin on actin filaments. This causes a conformational change that unmasks the active sites for myosin, allowing cross-bridge formation.

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Name the ion responsible for unmasking of active sites for myosin for cross-bridge activity during muscle contraction.

A

Potassium

B

Calcium

C

Magnesium

D

Sodium

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