Before revision: Sodium at a Cellular Level Sodium-Potassium Pump Here is a hand-drawn depiction of a membrane bound sodium-potassium pump and sodium and potassium ion channels can be seen along with the directed movement of the ions indicated by arrows.
After revision: Sodium at a cellular level Sodium-potassium pump Here is a hand-drawn depiction of a membrane bound sodium-potassium pump and sodium and potassium ion channels can be seen along with the directed movement of the ions indicated by arrows.