1. The picture represents both active and ___________________transport.

2. The ______________________-potassium pump removes _____ sodium ions while taking in ______ potassium ions

3. Active transport involves the use of ___________, or energy.

4. The sodium-potassium pump moves sodium against the _______________________ gradient.

5. The black circles in the diagram represent _____________________________________

6. Carrier proteins are used in ______________________ transport and do not require the cell to expend energy.

7. This type of diffusion is called __________________________________ diffusion.