diffusion osmosis

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Post on 10-May-2015




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For II-Hibiscus of CCNSHS. So sorry for the late upload, HIBS. Couldn't find my USB last night :) Don't hate me :( XOXO, Meggie


  • 1.Diffusion & Osmosis

2. DiffusionThe movement of molecules from an area in which they are highly concentrated to an area in which they are less concentrated. 3. Diffusion 4. Diffusion 5. Osmosis Thediffusion of water across a selectively permeable membrane. Osmosisis a type of Passive Transport. Osmosis requires NO ENERGY. 6. Osmosis 7. Type of Solution Isotonic- a solutionwhose osmoticpressure is equal tothat of the cell, nochange will occur thusa balance is maintained a solution that causesno change in the size ofthe cell 8. Type of Solution Hypertonic- a solutionwhose osmoticpressure is greaterthan that of the cell a solution that causesa cell to shrink becauseof Osmosis 9. Type of Solution Hypotonic- a solutionwhose osmoticpressure is lower thanthat of the cell a solution that causeswater to enter the cell,thus the cell will swellor even burst. 10. Osmosis In this picture a redblood cell is put in aglass of distilledwater. Because thereis a higherconcentration of wateroutside the cell, waterenters the cell byOSMOSIS. In thiscase too much waterenters and the cellswells to the point ofbursting open. 11. TYPES OF TRANSPORTMECHANISM 12. Simple Diffusion Theparticle istransportedthrough themembranewithout the aid ofpermease andw/o expenditureof energy by thecell Passive Transport 13. Facilitated Diffusion The particle istransportedthrough thepermease of themembrane butw/o expenditureof energy by thecell. PassiveTransport 14. Active Transport Theparticle is transported through the permease of the membrane and with the expenditure of energy (ATP) by the cell. 15. Bulk TransportBulk transport involves thecell membrane makingTwo kinds of bulk transportvesicles to bring materials1. Exocytosis: movingin and out of the cell. materials OUT of the cell. 2. Endocytosis: movingmaterials INTO the cell.There are 2 types ofendocytosis:1. Pinocytosis: bringingsmall molecules or liquidsinto the cell2. Phagocytosis: bringinglarge molecules into the cell 16. ExocytosisExocytosis is the process of exportingmaterials out of the cell byforming a membrane bound vesiclearound the materials. The cell usesexocytosis to get rid of cell waste or toexport proteins made in the cell to giveto other cells. 17. Endocytosis-Pinocytosis Endocytosis is themovement of materialsinto the cell through membrane bound vesicles.One type of endocytosis iscalled Pinocytosis, or celldrinking. Pinocytosis isthe movement of smallmolecules or liquids intothe cell through bulktransport. 18. Endocytosis-Phagocytosis phagocytosis, or cell eating. Phagocytosis is the movementof large molecules into the cellthrough bulk transport. 19. Endocytosis-Phagocytosis The large molecules make contact with the cellmembrane and the cell membrane pinches offaround the molecules. The lysosomes then fuse with the vesicle andbreak down the large molecules into nutrients. Phagocytosis is how white blood cells engulfbacteria and break them down.The lysosomes thenfuse with the vesicle and break dowthe largemolecules into nutrients.Phagocytosis is howwhite blood cells engulf bacteria anbreakthem down. 20. Why are osmosis & diffusionimportant? All living things have certain requirementsthey must satisfy in order to remain alive maintain homeostasis These include exchanging gases (usuallyCO2 and O2), taking in water, minerals,and food, and eliminating wastes. These tasks happen at the cellular level. Molecules move through the cellmembrane by diffusion A balance, or EQUILIBRIUM, must bemaintained.