Slide 1SolutionsSlide 3Slide 4Slide 5Slide 6Slide 7Slide 8Rates of DiffusionSlide 10Slide 11Unit 3: Osmosis & DiffusionUnit 3: Osmosis & DiffusionLearning Through Osmosis?“I’m a solution! OOOOH YEAH!”SolutionsSolution = Solute + SolventSolute: Particle dissolved in the solutionSolvent: liquid in which the solute is dissolvedDIFFUSION: the movement of SOLUTES from areas of High Concentration to Low ConcentrationOSMOSIS: movement of SOLVENT (water) from a HYPOTONIC to a HYPERTONIC solution (If solutions are Isotonic, then NO net movement of water) WATER POTENTIAL: potential energy of water (solvent) to moveTONICITY: describes the relative effect of solutes concentrations on the potential of water to move (WATER POTENTIAL) between 2 solutions - Hypotonic: Fewer solutes; Higher Water potential - Hypertonic: More solutes; Lower Water potential - Isotonic: Equal solutes; Equal Water potentialRates of Diffusion1) Concentration Gradient (difference in solute concentration between 2 solutions)-As CG increases, rate increases2) Temperature- As temperature increases, rates increases3) Membrane Permeability- As permeability increases, rate increasesTURGOR PRESSURE: -Internal Pressure of a cell that counteracts Osmotic pressure-Large Central vacuole & Cell Wall-Plant cells, NOT in animal cells Pond WaterSalt WaterDistilled WaterTURGOR PRESSURE: - TURGID: water ENTERS the central vacuole & presses against cell wall; High turgor pressure- FLACCID: water LEAVES the central vacuole & pressure is released; Low turgor pressurePond WaterSalt WaterDistilled
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