Cell Transport

6. The substance that is dissolved in a solution.
7. Diffusion, The movement of molecules from an area of high concentration to low concentration without using energy or transport proteins.
9. Diffusion, The movement of molecules across a cell membrane through transport proteins without using energy.
10. Head, The water-attracting part of a phospholipid molecule.
12. Bilayer, The double layer of phospholipids that forms the cell membrane.
15. The diffusion of water across a selectively permeable membrane.
16. A solution with a lower concentration of solutes than another solution, causing water to move into the cell.
17. A process in which a cell releases materials outside the cell using vesicles.
18. The process of maintaining a stable internal environment in an organism or cell.
19. Pump, A transport protein that uses energy to move substances across a cell membrane against the concentration gradient.

1. A solution with a higher concentration of solutes than another solution, causing water to move out of the cell.
2. A process in which a cell takes in large materials by surrounding them with the cell membrane.
3. Movement, The overall movement of particles in one direction.
4. Transport, The movement of substances across a membrane using energy, usually against the concentration gradient.
5. Tail, The water-repelling part of a phospholipid molecule.
7. A mixture formed when a solute dissolves in a solvent.
8. Transport, The movement of substances across a membrane without using energy, moving from high to low concentration.
11. The substance that dissolves the solute in a solution.
13. A solution with the same concentration of solutes as another solution, causing no net movement of water.
14. Gradient, The difference in concentration of a substance between two areas.