1. Do Now: Use this information to answer the questions
Where is the concentration of Na+ ions greater?
Where is the concentration of K+ ions greater?
The green structure represents a sodium and potassium pump protein. In which direction are the two ions being pumped? Against the gradient so this is an example of active transport.

2. ATP
The phosphate labeled high energy bond (the kick) is broken and the phosphate attaches to the pump protein to energize it and move the ions against its concentration gradien.

3. Sodium-Potassium Pump Maintains Homeostasis
Video on How the Sodium-Potassium Pump Works
Form of active transport
Used to maintain cell homeostasis. Homeostasis means the body is in balance, functioning properly.
Needed to regulate and maintain a specific Na+ and K+ concentration in the cell. Both ions are passively moving in and out of cell.