Cardiac muscle requires ................. for contraction to occur.

Sodium ions

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Calcium ions

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Phosphorous ions

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Sulphur ions

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Solution

The correct option is B Calcium ions
Cardiac muscle (heart muscle) is involuntary, striated muscle that is found in the walls and histological foundation of the heart, specifically the myocardium.
Cardiac muscle requires extracellular calcium ions for contraction to occur.
Hence the correct option is B.

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