Across
- 2. The structure that controls what enters and exits the cell
- 6. The difference in the amount of a substrate between two areas
- 9. A type of transport that does NOT require energy
- 10. Movement of molecules from high concentration to low concentration
- 11. The energy molecule used in active transport
- 12. Diffusion of water across a membrane
Down
- 1. A protein that changes shape to move molecules across the membrane
- 3. When molecules are evenly spread out
- 4. Transport proteins that form tiny tunnels through the membrane
- 5. Transport that requires energy from the cell
- 7. The process a cell uses to take large materials into the cell
- 8. Transport that moves materials against the concentration gradient