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AP Biology Osmosis and Diffusion Flashcards

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6730239355SolutionA liquid mixture of two or more substances0
6730239356SoluteA substance that is dissolved in a liquid1
6730239357SolventThe liquid in which a solute is dissolved2
6730239358DissolvedIf something is dissolved in a liquid, it can only be separated out if the liquid is evaporated off.3
6730239359SuspendedIf a substance is suspended the substance can be filtered out of the liquid4
6730239360ConcentrationHow much of a substance is found in a solution.5
6730239361DiffusionThe movement of a substance from an area of high concentration to an area of low concentration6
6730239362Concentration gradientThe change in the concentration of a substance from one area to another ex. photosynthesis(ATP pump) or excreting urine from the kidney.7
6730239363PermeableSubstances can pass through8
6730239364Impermeablesubstances cannot pass through9
6730239365Selectively permeableSome things can pass through, but not others10
6730239366EquilibriumWhere there is no net movement of the substance because the concentration is equal throughout.11
6730239367Net movementOverall change in concentration (NOTE: THERE IS STILL MOVEMENT EVEN IF THERE IS NO NET MOVEMENT)12
6730239368OsmosisThe movement of water from areas of high water concentration (low solute concentration) to low water concentration (high solute concentration).13
6730239369Isotonic SolutionA solution in which the concentration of the dissolved substance is equal on both sides of the cell membrane14
6730239370Hypertonic SolutionA solution in which the concentration of the dissolved substance is high (This is a relative term)15
6730239371Hypotonic SolutionA solution in which the concentration of the dissolved substance is low (This is a relative term).16
6730239372TurgidUsed to refer to a plant cell in a hypotonic solution17
6730239373FlaccidUsed to refer to a plant cell in an isotonic solution18
6730239374PlasmolysisUsed to refer to a plant cell in a hypertonic solution19
6730239375HomeostasisTo maintain a stable internal environment20
6730239376Turgor Pressurewater pressure within a plant cell.21
6730239377Lipidsfats. Cell Membrane fats are called Phospolipids22
6730239378Bilayertwo layers23
6730239379HydrophilicAttracted to water24
6730239380Hydrophobicnot attracted to water25
6730239381Passive transportMovement of a substance across the membrane without the use of protein or energy produced by the cell26
6730239382Active transportMovement of a substance across the membrane with the use of a protein an the use of energy produced by the cell27
6730239383Facilitated TransportMovement of a substance across the membrane with the use of a protein without the use of energy produced by the cell28
6730239384EndocytosisThe cell membrane fold around the substance and carries it into the cell29
6730239385ExocytosisThe cell membrane fold around the substance and carries it out of the cell30
6730239386Lysiswhen a cell explodes31
6730239387Fluid Mosaic ModelThe model of the cell membrane that has proteins and lipids moving flexably within the cell membrane32

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