Question

question: whats required by a sodium - potassium pump to bind three sodium ions inside the cell and release them outside the cell after moving through the pump? answer options: select one of four atp isotonicity passive transport concentration gradient

Explanation:

The sodium - potassium pump is an active transport mechanism. Active transport moves substances against their concentration gradient, and this process requires energy. ATP (adenosine triphosphate) is the energy - currency of the cell and provides the energy needed for the sodium - potassium pump to function. Isotonicity refers to a solution with the same osmotic pressure as another solution, which is not relevant here. Passive transport does not require energy and moves substances along the concentration gradient, while the sodium - potassium pump works against the gradient. A concentration gradient is what active transport works against, not what is required to power the pump. So the sodium - potassium pump needs ATP to bind three sodium ions inside the cell and release them outside.

Answer:

ATP