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In the context of the brain's cortex, a "pump" typically refers to the sodium-potassium pump (Na+/K+ ATPase), which is crucial for maintaining the electrochemical gradients across neuronal membranes. This pump actively transports sodium ions out of the cell and potassium ions into the cell, helping to regulate cellular excitability and overall neuronal function. Proper functioning of this pump is essential for processes such as action potential generation and neurotransmitter release.

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