The typical concentration of sodium is _______.the same as potassium intracellularly.lower than potassium extracellularly.lower than potassium intracellularly.higher than potassium intracellularly.
Question
The typical concentration of sodium is _______.the same as potassium intracellularly.lower than potassium extracellularly.lower than potassium intracellularly.higher than potassium intracellularly.
Solution
The typical concentration of sodium is lower than potassium intracellularly and higher than potassium extracellularly.
Here's why:
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Intracellularly: The concentration of sodium ions (Na+) is typically lower inside the cell compared to the concentration of potassium ions (K+). This is due to the activity of the sodium-potassium pump (Na+/K+ ATPase), which actively transports 3 Na+ ions out of the cell and 2 K+ ions into the cell, creating a higher concentration of K+ inside the cell.
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Extracellularly: Conversely, the concentration of sodium ions is typically higher outside the cell compared to the concentration of potassium ions. This is also due to the activity of the sodium-potassium pump, which maintains a higher concentration of Na+ outside the cell.
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