The sodium-potassium pump (NaK) is very important for the function of the most cellular process in the body, It's responsible for the movement of the K ions into the cell and the movement of the Na ions outside the cell at the same time.
It's important for excitable cells such as a nerve cell, the pump helps it with transmitting pluses. It also important in controls cardiac contractions and control blood pressure. It plays an important role in maintaining the sodium and potassium balance in the body in the kidneys.So the Cell function will be affected badly if there was no sodium-potassium pump.