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When the cardiac muscle cell is at rest, the concentration of _____________ is greater on the outside of the cell.Question 5Select one:A.sodiumB.potassium and sodiumC.calciumD.potassiumE.sodium and calcium

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When the cardiac muscle cell is at rest, the concentration of _____________ is greater on the outside of the cell.Question 5Select one:A.sodiumB.potassium and sodiumC.calciumD.potassiumE.sodium and calcium

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Solution

The answer is A. Sodium. When the cardiac muscle cell is at rest, the concentration of sodium is greater on the outside of the cell. This is due to the sodium-potassium pump, which actively transports sodium ions out of the cell and potassium ions into the cell. This creates a concentration gradient where there is a higher concentration of sodium ions outside the cell compared to inside.

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