CVS Practice Test 2025 - Free CVS Practice Questions and Study Guide

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What is the intracellular concentration of sodium in mmol/L?

135-145

10

The intracellular concentration of sodium is typically around 10 mmol/L. This is significantly lower than the extracellular concentration, which ranges from 135 to 145 mmol/L. The sodium gradient is essential for various physiological processes, including nerve impulse transmission and muscle contraction. Maintaining a low intracellular sodium concentration is important for cellular functions and helps to keep the cell in a stable, homeostatic state.

The other options represent extracellular concentrations or values that do not accurately reflect typical intracellular conditions. This contrast is a critical aspect of cell physiology and reflects the role of the sodium-potassium pump in regulating sodium levels within the cell.

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