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AP Biology: Membranes & Transport NEW Flashcards

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8661400601endomembrane systemA network of membranes inside and around a eukaryotic cell, related either through direct physical contact or by the transfer of membranous vesicles.0
8661400602dialysisThe diffusion of small solutes through a selectively permeable membrane.1
8661400603turgor pressureThe pressure inside of a cell as a cell pushes itself against the cell wall.2
8661400604plasmolysisThis happens when a cell shrinks inside its cell wall while the cell wall remains intact.3
8661400605flaccidThis happens when water moves, but the amount within the cell is constant; no pressure builds.4
8661400606cytolysisThis happens when a cell swells until pressure bursts it, resulting in cell death.5
8661400607crenationThis happens when a cell shrinks and shrivels; can result in cell death if severe.6
8661400608water potentialThe physical property predicting the direction in which water will flow, governed by solute concentration and applied pressure.7
8661400609solute potentialThis measurement has a maximum value of 0; it decreases as the concentration of a solute increases.8
8661400610pressure potentialThis measurement has a minimum value of 0 (when the solution is open to the environment); it increases as pressure increases.9
8661400611fluid mosaic modelStructural model of the plasma membrane where molecules are free to move sideways within a lipid bilayer.10
8661400612integral proteinsproteins that are permanently attached to the cell membrane11
8661400613transmembrane proteinsIntegral proteins that span the membrane.12
8661400614peripheral proteinsproteins that temporarily associate with a membrane; are not embedded in the lipid bilayer, are loosely bound to surface of membrane13
8661400615cell-cell recognitionThe function of membrane proteins in which some glycoproteins serve as ID tags that are recognized by membrane proteins of other cells.14
8661400616intercellular joiningThe function of membrane proteins in which membrane proteins of adjacent cells hook together, as in gap junctions or tight junctions.15
8661400617glycolipidsMembrane carbohydrates that are covalently bonded to lipids.16
8661400618glycoproteinsMembrane carbohydrates that are covalently bonded to proteins.17
8661400619transport proteinA membrane protein that has transports certain molecules or ions through the cell membrane18
8661400620channel proteinA transport protein that has a channel that allows passage of certain molecules or ions use19
8661400621aquaporinA transport protein that facilitates the passage of water through cell membranes20
8661400622carrier proteinA transport protein that binds molecules and changes shape to shuttles them across the membrane21
8661400623tonicityThe ability of a solution to cause a cell to gain or lose water; depends partly on concentration of nonpenetrating solutes relative to inside of cell.22
8661400624osmoregulationThe control of water balance.23
8661400625turgidA cell with a cell wall that has a reasonable amount of pressure but is healthy.24
8661400626cotransportThe coupling of the "downhill" diffusion of one substance to the "uphill" transport of another against its own concentration gradient.25
8661400627phagocytosisProcess in which extensions of cytoplasm surround and engulf large particles and take them into the cell.26
8661400628pinocytosisA type of endocytosis in which the cell "gulps" droplets of fluid into tiny vesicles.27
8661400629receptor-mediated endocytosisA type of endocytosis in which the cell acquires bulk quantities of specific substances, even though they may not be very concentrated in the extracellular fluid.28

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