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Ch. 5 Biological Membranes

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9990337Phospholipidsamphipathic material that makes up cell membranes
9990338Fluid Mosaic ModelCurrent model of the cell membrane, Singer and Nicholson
9990339Liquid crystalOrganized structure that flows free, changing with temperature
9990340Integral proteinGoes through at least part of membrane layer
9990341Transmembrane ProteinGoes all the way through the mebrane
9990342Peripheral proteinProtein on the outside/edge of the cell membrane
9990343AnchoringConnect microfilaments within the cell, hold cell to the extracellular matrix
9990344Passive transportNo energy needed, high to low concentration, Proteins that form channels for selective passage of ions/molecules
9990345Active TransportRequires energy, from low to high concentration, usually a pump, always ATP, Some transport proteins pump solutes across the membrane, enery required
9990346Enzymatic actionMembrane0bound enzymes catalyze reactions that take place within/along the membrane surface with these proteins
9990347Signal transductionReceptors bind with signal molecules such as hormones and transmit info into the cell
9990348Cell recognitionGlycoproteins functioning as identification tags
9990349Intercellular junctionCell adhesion proteins attach membranes of adjacent cells
9990350DiffusionMovement of particles from high concentration to low concentration, based on temp, concentration, size of molecule and charge
9990351OsmosisDiffusion of water across a membrane
9990352Osmotic pressurePush back from a solution that water is trying to enter
9990353IsotonicEqual levels of solutes, equal movement of water in and out of cell
9990354HypertonicGreater concentration of solute in solution, the cell would shrivel in this solution
9990355HypotonicLesser concentration of solute and greater concentration of water, cell would burst in this solution
9990356Turgor pressurePlants use this property to be able to stand upright, needs water
9990357PlasmolysisCytoplasm pulls back from cell wall
9990358Facilitated transportDiffusion that requries a helper protein
9990359Channel ProteinHelps with diffusion, no shape change
9990360Carrier ProteinHelps with diffusion, changes shape to help
9990361Bulk TransportMoving the big stuff
9990362ExocytosisMoving big stuff out of the cell
9990363EndocytosisGeneral term for moving big stuff into cell
9990364Phagocytosis"Cell eating", cell takes in solids
9990365Pinocytosis"Cell drinking" cell takes in liquids
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