| A | B |
|---|
| semi-permeable | allows some materials to pass through while keeping others out |
| diffusion | the movement from high concentration to lower concentration |
| osmosis | the diffusion of water across a cell membrane |
| active transport | the movement of molecules across a cell membrane requiring energy |
| passive transport | the movement of molecules across a cell membrane without the use of energy |
| equilibrium | molecules are spread evenly throughout a space |
| endocytosis | the active transport of large substances to the inside of the cell by engulfing the substance |
| exocytosis | the active transport of substances to the outside of the cell by fusing with the cell membrane and bursting to release the substance |
