There is a higher concentration of sodium outside of the cell membrane of neurons than inside the cell membrane.
The sodium potassium pump is an ATP-based pump that sends three sodium out of the cell for every two potassium sent in. Because the pump transports salts against the gradient, it requires ATP to function. The salts travel by active transport.
Potassium leaks out of the cell through potassium channels, which is movement with the concentration gradient.
There is a higher concentration of potassium inside the cell membrane of neurons than outside.
The voltage of the cell at resting potential is about -70 millivolts.
At the resting potential, voltage-gated sodium channels are closed, which prevents sodium from flooding into the cell and causing depolarization.
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