Which one of the following minerals controls heart?

Sulphur

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Sodium

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Iron

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Potassium

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Solution

The correct option is C Sodium
Sodium ions play a major role in the activity of the heart. Their influx via the sodium channels increases the membrane potential of the cells. This causes depolarization of the cardiac muscles and triggers an influx of calcium ion inside the cell which increases the depolarization even more.
So, the correct answer is 'Sodium'.

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