| Term | Definition |
|---|
| diffusion | the movemnt of molecules from an area of higher concentration to an area of lower concentration |
| concentration gradient | difference in concentration of molecules across a distance |
| equilibrium | concentration evenly distributed across a distance |
| simple diffusion | diffusion across membranes |
| osmosis | diffusion across a membrane |
| hypotonic | direction of osmosis: diffused INTO a cell |
| hypertonic | direction of osmosis: diffused OUT OF a cell |
| isotonic | directoin of osmosis: equal (NO movement) |
| turgor pressure | the pressure exerted against the cell wall by water |
| plasmolysis | cells shrink (less turgor pressure) |
| carrier proteins | transfer materials (that cannot readily diffuse through membrane) through membrane |
| ion channels | allow ions to pass into a cell shielded from phospholipid tails |
| endocytosis | cells ingest external fluid, macromolecules and large particles through this process |
| vesicle | transport pouch of phospholipids |
| pinocytosis | ingestion of fluids or solutes |
| phagocytosis | ingestion of large particles/ whole cells |
| phagocytes | ingest viruses and bacteria to destroy them before harm can be done to the organism |
| exocytosis | cells release external fluid, macromolecules and large particles through this process |
| semipermeable membranes | membranes that allow certain substances to enter but block others |
Combine with other sets
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