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Biology 2
| Term | Definition |
|---|---|
| Osmosis | process by which water molecules diffuse through a membrane |
| Facilitated diffusion | diffusion occurs with the help of a carrier molecule across a cell membrane |
| Diffusion | process by which molecules move from areas of high concentration to area of low concentration |
| Endocytosis | process of taking materials into the cell by means of infoldings, or pockets of the cell membrane |
| Phagocytosis | “cell eating” extensions of the cytoplasm |
| Pinocytosis | pockets from along the cell membrane, fil with liquid and pinch off to form vacuoles within the cell |
| Exocytosis | membrane of the vacuole surrounding the material fuses with the cell membrane, forcing the contents out of the cell |
| Passive Transport | Molecules move from an area of high concentration to areas of low concentration |
| Active Transport | Molecules are pushed from regions of low concentrations to areas of high concentration |
| Isotonic solution | The concentration of solutes is the same inside and outside the cell. Because of this the cell size remains the same when placed in an isotonic solution |
| Hypertonic solution | The solution has a higher concentration of solutes that the cell. Because of the the cell will shrink or shrivel when placed in the solution |
| Hypotonic solution | “Under solute” The solution has a lower concentration of solutes than the cell. Because of this the cell will swell when placed in the solution |
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