Which of the following is the principal positively charged ion inside body cells?

Question

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Potassium is the principal positively charged ion inside body cells. It is important for various cellular functions such as maintaining the resting membrane potential, regulating fluid balance, and contributing to nerve and muscle function. Sodium is more prevalent in extracellular fluid, while calcium and magnesium are primarily involved in bone formation and muscle contraction, respectively.

Which of the Following Is the Principal Positively Charged Ion