| Term | Definition |
|---|
| selective permeability | A property of biological membranes that allows some substances to cross more easily than others. |
| amphipathic molecule | A molecule that has both a hydrophilic region and a hydrophobic region.ex phospholipids |
| fluid mosaic model | the membrane is a fluid structure with a "mosaic of various proteins embedded in or attached to a double layer (bilayer) of phospholipids (what kind of model is this?) |
| lateral movement | phospholipids make this motion, swapping places w/ adjacent phosphos approx 10 million times/sec |
| flip flop | phosphlipd movement changing from one side to another of the membrane |
| integral proteins | a transmembrane protein with hydrophobic regions that extend into and often completely span the hydrophobic interior of the membrane and with hydrophilic regions in contact with the aqueous solution on either side of the membrane or lining channel. |
| peripheral protein | Protein loosely bound to the surface of a membrane or to part of an integral protein. Not embedded in lipid bilayer. |
| transport proteins | A transmembrane protein that helps a certain substance or class of closely related substances to cross the membrane. |
| enzymatic protein | A protein in the Plasma Membrane that catalyzes a specific chemical reaction |
| intercellular joining | membrane proteins of adjacent cells hook together to form various junctions |
| cell recognition | cellular handshake; connected through something like a transmembrane protein, Glycoproteins functioning as identification tags |
| membrane carbohydrate | may be covalently bonded to lipids (forming glycolipids) or more commonly to proteins (forming glycoproteins). important for cell recognition |
| channel protein | protein that forms a channel to allow a particular molecule or ion to cross the plasma membrane |
| passive transport | the diffusion of particles through proteins in the cell membrane from areas where the concentration of particles is high to areas where the concentration of particles is low. it does not require energy to be done because it increase entropy. |
| osmosis | diffusion of water across a selectively permeable membrane from high concentration to a lower concentration. |
| hypertonic solution | In comparing two solutions, the one with the greater concentration of solutes; cells in such a solution will lose water to their surroundings. |
| hypotonic solution | In comparing two solutions, the one with the lower concentration of solutes; cells in such a solution will take up water from their surroundings. |
| isotonic solution | A solution having the same solute concentration as another solution. |
Combine with other sets
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