ANATOMY

Detailed explanation-1: -The sodium potassium pump restores resting potential because it moves three positively charged sodium ions out of the cell and only brings in two positively charged potassium ions. In a normal neuron there is a greater concentration of sodium outside the cell and a greater concentration of potassium inside the cell.

Detailed explanation-2: -The sodium-potassium pump transports sodium out of and potassium into the cell in a repeating cycle of conformational (shape) changes. In each cycle, three sodium ions exit the cell, while two potassium ions enter.

Detailed explanation-3: -At resting membrane potential, ions move through leak channels, which are membrane channels that stay open. Some ions are moved in or out of cells by active transport mechanisms, including the sodium-potassium exchange pump.

Detailed explanation-4: -The sodium-potassium pump maintains the electrochemical gradient of living cells by moving sodium in and potassium out of the cell. The primary active transport that functions with the active transport of sodium and potassium allows secondary active transport to occur.