Which is correct concerning sodium and potassium ion concentrations? Sodium and potassium are both more concentrated outside the cell than inside. Sodium and potassium are both more concentrated inside the cell than outside. Potassium is more concentrated outside the cell; sodium is more concentrated inside the cell. Sodium is more concentrated outside the cell; potassium is more concentrated inside the cell.2.4 points

The correct statement concerning sodium and potassium ion concentrations is: Sodium is more concentrated outside the cell; potassium is more concentrated inside the cell.

Here's why:

1. Sodium ions (Na+) are more concentrated outside the cell: This is due to the action of the sodium-potassium pump, which actively transports sodium ions out of the cell. This creates a higher concentration of sodium ions outside the cell compared to inside.

2. Potassium ions (K+) are more concentrated inside the cell: The sodium-potassium pump also transports potassium ions into the cell, creating a higher concentration of potassium ions inside the cell compared to outside.

This difference in concentrations is essential for maintaining the cell's membrane potential and for the function of neurons and muscle cells.