| Term | Definition |
| passive transport | movement of molecules from area of high concentration to an area of lower concentration |
| exocytosis | process by which a cell expels wastes from a vesicle |
| facilitated diffusion | passive transport of a particle across a cell membrane with assistance from a channel protein |
| active transport | particle movement across a cell membrane from area of low concentration to an area of high concentration |
| carrier protein | binds with molecules and transports them across a cell membrane |
| pinocytosis | the process of engulfing liquid food material and brining it inside the cell by forming a vesicle |
| energy | is expended during active transport |
| phospholipid bilayer | composes the primary structure of the cell membrane |
| phagocytosis | the process of engulfing solid food material and bringing it inside the cell by fomring a vesicel |
| diffusion | particle movement across a cell membrane from area of high concentration to an area of low concentration |
| hypertonic | solutions in which there is a higher solute concentration outside the cell than inside the cell resulting in water diffusing out of the cell by osmosis, cell will shrink in size |
| isotonic | solutions which have equal concentrations of substances inside and outside the cell there will be equal amounts of water moving in and out of the cell |
| hypotonic | soluts in which there is a higher solute concentraiont inside the cell then oustide the cell resulting in water diffusing into cell by osmosis. cell will smell and if concentration is gradient it could burst |