1. Active transport: movement of large molecules across the cell
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Diffusionosmosis201522715.notebook March 02, 2015 1. Active transport: movement of large molecules across the cell membrane that uses the cell's energy. 2. Diffusion:the movement of molecules from an area of high concentration to an area of low concentration. 3.Endocytosis: The movement of very large particles into the cell. Energy is used and a vesicle is formed. 4. Exocytosis: A vesicle joins with the cell membrane and large particles are released. 5. Facilitated diffusion: Molecules enter the cell through openings created by proteins in the cell membrane. 6. Osmosis: diffusion of WATER. 7. Passive transport: Movement of molecules across the cell membrane that does NOT require the cell to use its own energy. (diffusion, facilitated diffusion and osmosis) 1 Diffusionosmosis201522715.notebook March 02, 2015 Moving Materials Across The Cell Membrane 2 Diffusionosmosis201522715.notebook . March 02, 2015 Predict what will happen when the stopper is removed from the perfume bottle. 3 Diffusionosmosis201522715.notebook March 02, 2015 Identify the small brown objects. Describe what you are observing. 4 Diffusionosmosis201522715.notebook March 02, 2015 5 Diffusionosmosis201522715.notebook March 02, 2015 6 Diffusionosmosis201522715.notebook March 02, 2015 7 Diffusionosmosis201522715.notebook March 02, 2015 8 Diffusionosmosis201522715.notebook March 02, 2015 9 Diffusionosmosis201522715.notebook March 02, 2015 Molecules move to achieve equilibrium­ a state of equal concentration equilibrium 10 Diffusionosmosis201522715.notebook O O O O O O O O March 02, 2015 O OXYGEN ATOM 11 Diffusionosmosis201522715.notebook March 02, 2015 • Observe the red molecules. • Over time the red molecules diffuse from an area of high concentration to an area of low concentration. • Diffusion stops when the red and blue molecules are in equilibrium. 12 Diffusionosmosis201522715.notebook March 02, 2015 13 Diffusionosmosis201522715.notebook March 02, 2015 14 Diffusionosmosis201522715.notebook March 02, 2015 15 Diffusionosmosis201522715.notebook March 02, 2015 16 Diffusionosmosis201522715.notebook March 02, 2015 17 Diffusionosmosis201522715.notebook March 02, 2015 Do Now: Complete the diagram below. Draw arrows on diagrams 1 and 2 to show the direction the molecules will move. 18 Diffusionosmosis201522715.notebook March 02, 2015 Selectively permeable membrane • A membrane that allows only certain materials to cross it 19 Diffusionosmosis201522715.notebook March 02, 2015 This type of membrane limits what can enter or exit the cell. water glucose 20 1. The mesh bag represents the cell membrane. The mesh bag is like a cell membrane because: the bag surrounds the March 02, 2015 materials inside of it and allows only some things to go through it. The cell membrane surrounds the cell and allows materials to pass through it. 2. The balls and the sand represent molecules of different sizes. The balls represent molecules that are large and the sand represents molecules that are tiny or smaller. 3. The materials that the mesh bag allows to pass through must be smaller than the openings (holes) in the mesh bag. 4. The balls cannot pass through the mesh bag because they are too large to fit through the openings in the mesh bag. 6.Two other materials that can pass through the mesh bag are water (liquids), gasses such as air or oxygen, sugar, salt, flour,and very small pebbles, or any material that is smaller than the openings in the mesh bag. Diffusionosmosis201522715.notebook 21 Diffusionosmosis201522715.notebook March 02, 2015 5. Other materials that could remain in the bag are bricks, a bowl, a shoe (not Barbie's),or any other object that is larger than the openings in the mesh bag. 7. The mesh bag is considered to be selectively permeable because it allows only objects that are smaller than the openings to pass through. 8. The illustration shows passive transport because no energy was used to move the sand through the openings in the bag. 22 Diffusionosmosis201522715.notebook March 02, 2015 CELL MEMBRANE protein http://mrphome.net/mrp/Membrane_Transport.html 23 Diffusionosmosis201522715.notebook March 02, 2015 24 Diffusionosmosis201522715.notebook March 02, 2015 25 Diffusionosmosis201522715.notebook March 02, 2015 http://mrphome.net/mrp/Membrane_Transport.html 26 Diffusionosmosis201522715.notebook March 02, 2015 27 Diffusionosmosis201522715.notebook March 02, 2015 28 Diffusionosmosis201522715.notebook March 02, 2015 sugar molecules 29 Diffusionosmosis201522715.notebook March 02, 2015 Sugar molecules move through the protein channel. sugar molecule 30 Diffusionosmosis201522715.notebook March 02, 2015 http://mrphome.net/mrp/Membrane_Transport.html 31 Diffusionosmosis201522715.notebook March 02, 2015 32 Diffusionosmosis201522715.notebook March 02, 2015 OSMOSIS: The movement of WATER OSMOSIS molecules across a selectively permeable membrane. 33 Diffusionosmosis201522715.notebook March 02, 2015 http://zoology.okstate.edu/zoo_lrc/biol1114/tutorials/Flash/Osmosis_Animation.htm 34 Diffusionosmosis201522715.notebook March 02, 2015 The Effect of Osmosis on Animal and Plant Cells HypOtonic Solution • water moves into the cell • the cell swells BURST! and may burst http://www.nclark.net/osmosisPocus.gif 35 Diffusionosmosis201522715.notebook March 02, 2015 The Effect of Osmosis on Animal and Plant Cells HyPERtonic solution • water moves out of the cell • the cell shrinks BURST! http://www.nclark.net/osmosisPocus.gif 36 Diffusionosmosis201522715.notebook March 02, 2015 The Effect of Osmosis on Animal and Plant Cells Isotonic solution concentration of water is the same BURST! in and out side of the cell. http://www.nclark.net/osmosisPocus.gif 37 Diffusionosmosis201522715.notebook March 02, 2015 The Effect of Osmosis on Animal and Plant Cells BURST! http://www.nclark.net/osmosisPocus.gif 38 Diffusionosmosis201522715.notebook March 02, 2015 http://www.nclark.net/osmosisPocus.gif 39 Diffusionosmosis201522715.notebook March 02, 2015 Distilled water is 100% water with NO other dissolved materials. 40 Diffusionosmosis201522715.notebook March 02, 2015 Osmosis Which way will the water flow? Fresh Water Fish } Salt Water Fish } 80% water Salt Fresh 15% salt water water 5% other minerals 85% water in the cells of the fish 95% water 5% other minerals http://www.nclark.net/osmosisPocus.gif 41 Diffusionosmosis201522715.notebook March 02, 2015 Active Transport 42 Diffusionosmosis201522715.notebook March 02, 2015 http://mrphome.net/mrp/Membrane_Transport.html 43 Diffusionosmosis201522715.notebook March 02, 2015 WASTE 44 Diffusionosmosis201522715.notebook March 02, 2015 ENDOCYTOSIS http://www.youtube.com/watch?v=0w0PmVxDvXE 45 Diffusionosmosis201522715.notebook March 02, 2015 http://mrphome.net/mrp/Membrane_Transport.html 46 Diffusionosmosis201522715.notebook March 02, 2015 EXOCYTOSIS 47 Diffusionosmosis201522715.notebook March 02, 2015 http://www.pbslearningmedia.org/asset/tdc02_int_membraneweb/ 48 Diffusionosmosis201522715.notebook March 02, 2015 Passive Transport: The movement of molecules from an area of high concentration to an area of lower concentration without the use of energy Passive Transport 3 Types Diffusion Facilitated Diffusion The movement of molecules other than water from high to low Osmosis The movement of water from high to low The movement of some large molecules using protein channels. 49 Diffusionosmosis201522715.notebook March 02, 2015 Active Transport: The movement of substances across a cell membrane using energy Active Transport Move substances from low to high concentration Endocytosis: vesicles bring materials IN Exocytosis vesicles carry materials OUT! 50 Diffusionosmosis201522715.notebook March 02, 2015 Active Transport: The movement of substances across a cell membrane using energy Active Transport Move substances from low to high concentration http://www.pbslearningmedia.org/asset/tdc02_int_membraneweb/ Endocytosis: Exocytosis 51 Diffusionosmosis201522715.notebook March 02, 2015 starch(white) added to iodine = blackish­purple Iodine is an indicator that turns blackish­purple ________________ when added to starch. 52 Diffusionosmosis201522715.notebook March 02, 2015 Diffusion across a dialysis membrane. starch molecule iodine molecule water molecule 53 Diffusionosmosis201522715.notebook March 02, 2015 Go to these web sites to view the animations I showed in class. http://mrphome.net/mrp/Membrane_Transport.html http://www.pbslearningmedia.org/asset/tdc02_int_membraneweb/ http://www.nclark.net/osmosisPocus.gif http://www.northland.cc.mn.us/biology/Biology1111/animations/transport 1.html 54 Diffusionosmosis201522715.notebook March 02, 2015 GUMMY BEAR OSMOSIS 55 Diffusionosmosis201522715.notebook March 02, 2015 56 Diffusionosmosis201522715.notebook March 02, 2015 If I put the gummy bear in water for 24 hours, then the gummy bear will_____________________, because________________. 57 Diffusionosmosis201522715.notebook March 02, 2015 58 Diffusionosmosis201522715.notebook March 02, 2015 http://www.youtube.com/watch?v=HqKlLm2MjkI 59 Diffusionosmosis201522715.notebook March 02, 2015 % Change in Height After Soaking Height ­ Before soaking Height / Before Soaking Height X 100 http://www.youtube.com/watch?v=HqKlLm2MjkI 60 Diffusionosmosis201522715.notebook March 02, 2015 61 March 02, 2015 % CHANGE Diffusionosmosis201522715.notebook WIDTH MASS HEIGHT 62 Diffusionosmosis201522715.notebook March 02, 2015 63 Diffusionosmosis201522715.notebook March 02, 2015 EGG OSMOSIS http://www.youtube.com/watch?v=SSS3EtKAzYc 64 Diffusionosmosis201522715.notebook March 02, 2015 Osmosis in Plant Cells • Observe Elodea leaves • • 10% NaCl Predictions? • 90% water Plasmolysis Hypertonic • Distilled water Hypotonic htp://www.tvdsb.on.ca/westmin/science/sbi3a1/Ce 65 Diffusionosmosis201522715.notebook March 02, 2015 Transportation of Molecules • Passive Transport • Active Transport 66 Diffusionosmosis201522715.notebook March 02, 2015 What is Passive Transport ? • no energy required • Ex: Diffusion, Osmosis and facilitated diffusion • Facilitated Diffusion: Movement of molecules across a semi-permeable membrane with a transport protein. Used to move large molecules 67 Diffusionosmosis201522715.notebook March 02, 2015 http://www.nclark.net/osmosisPocus.gif 68 Diffusionosmosis201522715.notebook March 02, 2015 69 Attachments gerisch4.avi Diffusion__amp osmisisdiffusionannimation13.mht
