Problem: As the cell produces the ion concentration gradient, it uses a specific protein in the membrane called the sodium-potassium pump. This pump uses energy from ATP to move ions across the membrane. For every cycle, it pumps sodium ions (Na?) out of the cell and potassium ions (K?) into the cell. Because potassium ions are being moved into areas where they are already more concentrated, energy is required. This continuous pumping maintains a high concentration of potassium inside the cell and a lower concentration outside, creating and sustaining the gradient. Just very tiny bit in it please. Need Assignment Help?