Diffusion and Osmosis



1. channel ____; helps move materials across membrane
2. a major component of the cell membrane
5. prefix that means "inside"
6. diffusion of water
8. when molecules are evenly spread out
10. taking in of large particles by the cell


3. transport that requires energy
4. solution has a greater concentration of molecules
7. type of transport that does not require energy
9. outer boundary of the cell
11. turns purple in the presence of starch, indicator
12. movement of molecules from high to low concentration
13. a difference in concentrations
14. lets some things through; selectively _____
15. solution has a lesser concentration of molecules