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Cell Transportation
| Term | Definition |
|---|---|
| diffusion | movement of dissolved molecules in a fluid or gas from a region of higher concentration to an area of lower concentration |
| facilitated diffusion | diffusion of molecules assisted by protein channels that pierce a cell membrane |
| osmosis | diffusion of water molecules across a semipermeable membrane from an area of higher water concentration to an area of lower water concentration |
| active transport | energy requiring movements of molecules across a membrane from a region of lower concentration to an region of higher concentration |
| endocytosis | the process of taking liquids or fairly large molecules in a cell by engulfing them in a membrane |
| exocytosis | the opposite of endocytosis; is the release of substances out of a cell by the fusion of a vesicle with the membrane |
| selective permeability | condition or quality of allowing some, but not all, materials to cross the barrier or membrane |
| hypertonic solution | solution that has a higher concentration of dissolved particles than a cell |
| hypotonic solution | solution that has a lower concentration of dissolved particles than a cell |
| isotonic solution | solution that has an equal concentration of dissolved particles compared with another solution |
Created by:
meg.minor.15
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