The metal ion, that plays an important role in muscle contraction is:

B e^{2 +}

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M g^{2 +}

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C a^{2 +}

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B a^{2 +}

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Solution

The correct option is C $C a^{2 +}$
Muscle contraction is regulated by $C a^{2 +}$ ion, which will change thin filament into activated state. The binding of calcium to the troponin changes its shape so that the myosin binding sites on the actin (thin filaments) are exposed causing a muscle contraction.

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The metal ion, that plays an important role in muscle contraction is:

The correct option is C Ca2+Muscle contraction is regulated by Ca2+ ion, which will change thin filament into activated state. The binding of calcium to the troponin changes its shape so that the myosin binding sites on the actin (thin filaments) are exposed causing a muscle contraction.