| Term | Definition |
| Passive Transport Mechanisms | diffusion,facilitated diffusion,osmosis,filtration |
| Diffusion | Movement of a substance from an area of high concentration to an areaof low concentration |
| Facilitated diffusion | A helper molecule within the membrane assissts the movement of substance from an area of high concentration to an area of low concentration |
| Osmosis | Movement of water (solvent)from an area with more water to an area with less |
| Filtration | movement of watr and dissolved substance from an area of high pressure to an area of low pressure: the water and dissolved substance are pushed |
| Tonicity | The ability of a solution to affect the volume and pressure in a cell. |
| Active transport pump | Movement of a substance uphill(from an area of low concentration to an area of hight concentration) Require ATP |
| Endocytosis | Taking in ingesstion of substance by cell membrane |
| Phagocytosis | Engulfing of solid particles by the cell membrane(cellullar eating) |
| Pinocytosis | Cellullar drinking |
| Exocytosis | Secretion of cellular products (protein, debris) out of the cell |
| Isotonic | Same concentration as intercellular fluid |
| Hypotonic | Where there is more water to where there is less-pure water , being more dilute than the inside of the cell - cause RBC's to burst or lyse |
| hemolysis | burst or lyse |
| hypertonic | Very concentration salt solution, water diffuse out of the RBC into the bathing solution - causes shrink or crenate |