diffusion and osmosis

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Diffusion and Osmosis. TSWBAT identify the process of osmosis and diffusion via the gummi bear lab -analyze diffusion through a sand baggie and apply the concepts of hypotonic, hypertonic, and isotonic to the activity. On a blank sheet of paper Write the equation for cellular respiration. - PowerPoint PPT Presentation

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  • Diffusion and Osmosis

  • TSWBAT identify the process of osmosis and diffusion via the gummi bear lab-analyze diffusion through a sand baggie and apply the concepts of hypotonic, hypertonic, and isotonic to the activityOn a blank sheet of paperWrite the equation for cellular respiration.Where does cellular respiration occur in the cell?List the organelles that help to make proteinsWhat is the difference between the rough and the smooth endoplasmic reticulum?

  • DiffusionSolvent what dissolve somethingSolute what is being dissolved

    Solute molecules moving from an area of high concentration to an area of low concentration

    Random motion drives diffusion

    Movement is based on kinetic energy (speed), charge, and mass of molecules

    Equilibrium is reached when there is an even distribution of solute moleculeshttp://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter2/animation__how_diffusion_works.html

    (water)

  • OsmosisDiffusion of water through a semi-permeable membraneSemi-permeable: permeable to solvents (WATER), but not to large moleculesHigh [water] to low [water]

    Dissolved molecules (i.e. glucose, starch) are called solutes

    REMEMBER:Water = solventGlucose, Starch = soluteshttp://highered.mcgrawhill.com/sites/0072495855/student_view0/chapter2/animation__how_osmosis_works.html

  • Effect of Water on CellsHypertonic Environment High [solute], low [water]The cell will shrinkPlasmolysis cell death

    Hypotonic EnvironmentHigh [water], low [solute]Plants turgor pressure plant like this!!Animals cytolysis cell bursting

    Isotonic Environment[water] = [solute]IsotonicHypotonicHypertonicPart 3 pg. 85

  • Osmosis in Living Cells

  • Osmosis in Red Blood Cells 0.9% saline

    10% NaCl

    Distilled water

    Plasmolysis

  • Osmosis in Plant Cells.

    10% NaCl

    Distilled water

    Plasmolysis

  • AnimationsDialysis Bag Experimenthttp://ccollege.hccs.cc.tx.us/instru/Biology/AllStudyPages/Diffusion_Osmosis/Baggif.swf

    Elodea Cellhttp://ccollege.hccs.cc.tx.us/instru/Biology/AllStudyPages/Diffusion_Osmosis/Elodeagif.swf

    Osmosishttp://ull.chemistry.uakron.edu/genobc/animations/osmosis.mov

  • Transportation of Molecules Passive TransportMovement of molecules across a semi-permeable membrane no energy required Active TransportMovement of molecules across a semi-permeable membrane against a concentration gradient with a protein ENERGY ATP Facilitated DiffusionMovement of molecules across a semi-permeable membrane with a protein no energy required

  • Effect of Water on RBC

  • *************