| A | B |
|---|
| diffusion | movement of materials from an area of high concentration to an area of low concentration |
| selectively permeable membrane | a membrane that will allow some materials to pass through but not others |
| osmosis | the diffusion of water through a selectively permeable membrane |
| facilitated diffusion | diffusion of large particles across the cell's membrane using special protein channels |
| passive transport | the movement of materials across a cell membrane without using enery |
| equilibrium | when the molecules of a substance are spread equally throughout a space, a state called equilibrium has occured |
| active transport | the movement of materials across a membrane from an area of low concentration to an area of high concentration |
| endocytosis | occurs when a large piece of material is surrounded, or enclosed by the cell's membrane |
| exocytosis | a vesicle inside the cell will merge with the cell membrane and the contents of the vesicle will be pushed out of the cell |
| examples of passive transport | diffusion, osmosis, and facilitated diffusion |
