| A | B |
|---|
| passive transport | movement of substances through the cell membrane without the input of energy |
| diffusion | random movement of molecules from high concentration to low concentration |
| equilibrium | occurs when molecules of one substance are spread evenly throughout another substance |
| osmosis | diffusion of water througha cell membrane |
| facilitated diffusion | passive transport in which transport proteins help molecules get through the cell membrane |
| active transport | occurs when energy is required to move materials through a cell membrane |
| endocytosis | process of taking substances into a cell by surrounding it with the cell membrane |
| exocytosis | contents of a vesicle are released by the cell |
