| A | B |
|---|
| diffusion | The movement of particles from an area of high concentration to an area of low concentration |
| osmosis | The diffusion of water across a cell membrane |
| passive transport | The diffusion of particles from an area of high concentration to an area of low concentration |
| active transport | The movement of particles of against the normal direction of diffusion; requires cells to use energy |
| endocytosis | The cell membrane surrounds a particle and encloses it in a vesicle |
| exocytosis | a vesicles removes a particle from the cell by fusing with the cell membrane |
| ATP | A molecule that stores energy in form that cells can use |
| cell membrane | Acts as a barrier between the inside and outside of the cell's environment |
