Which of the following ions play a key role in muscle contraction?

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Na⁺, Ca⁺⁺

Na⁺, K⁺

Ca⁺⁺, K⁺

Ca⁺⁺, Mg⁺⁺

answer is D.

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Detailed Solution

Calcium ions initiate the process of muscle contraction. Magnesium ions help in regulation of muscle contraction. Magnesium acts as a natural calcium blocker to help muscles relax. Hence Ca⁺⁺ and Mg⁺⁺ions are involved in muscle contractions.

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