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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.

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Presentation on theme: "Diffusion and Osmosis. TSWBAT identify the process of osmosis and diffusion via the gummi bear lab -analyze diffusion through a sand baggie and apply."— Presentation transcript:

1 Diffusion and Osmosis

2 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. –Where does cellular respiration occur in the cell? –List the organelles that help to make proteins –What is the difference between the rough and the smooth endoplasmic reticulum?

3 Diffusion Solvent – what dissolve something Solute – 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 molecules –http://highered.mcgraw- hill.com/sites/0072495855/studen t_view0/chapter2/animation__ho w_diffusion_works.htmlhttp://highered.mcgraw- hill.com/sites/0072495855/studen t_view0/chapter2/animation__ho w_diffusion_works.html 2 3 1 4 (water)

4 Osmosis Diffusion of water through a semi- permeable membrane –Semi-permeable: permeable to solvents (WATER), but not to large molecules –High [water] to low [water] Dissolved molecules (i.e. glucose, starch) are called solutes REMEMBER: Water = solvent Glucose, Starch = solutes http://highered.mcgrawhill.com/sites/0072495855/student_view0/cha pter2/animation__how_osmosis_works.html

5 Effect of Water on Cells Hypertonic Environment –High [solute], low [water] –The cell will shrink –Plasmolysis – cell death Hypotonic Environment –High [water], low [solute] –Plants – turgor pressure – plant like this!! –Animals – cytolysis – cell bursting Isotonic Environment –[water] = [solute] Isotonic HypotonicHypertonic Part 3 pg. 85

6 Osmosis in Living Cells Cellulose in cell wall

7 Osmosis in Red Blood Cells Isotonic Hypotonic Hypertonic 0.9% saline 10% NaCl Distilled water Predictions? Plasmolysis

8 Osmosis in Plant Cells. 10% NaCl Distilled water Hypertonic Hypotonic Predictions? Plasmolysis

9 Animations Dialysis Bag Experiment http://ccollege.hccs.cc.tx.us/instru/Biology/AllStudy Pages/Diffusion_Osmosis/Baggif.swfhttp://ccollege.hccs.cc.tx.us/instru/Biology/AllStudy Pages/Diffusion_Osmosis/Baggif.swf Elodea Cell http://ccollege.hccs.cc.tx.us/instru/Biology/AllStudy Pages/Diffusion_Osmosis/Elodeagif.swfhttp://ccollege.hccs.cc.tx.us/instru/Biology/AllStudy Pages/Diffusion_Osmosis/Elodeagif.swf Osmosis http://ull.chemistry.uakron.edu/genobc/animations/o smosis.movhttp://ull.chemistry.uakron.edu/genobc/animations/o smosis.mov

10 Transportation of Molecules Passive Transport -Movement of molecules across a semi-permeable membrane - no energy required Active Transport -Movement of molecules across a semi-permeable membrane against a concentration gradient with a protein - ENERGY – ATP Facilitated Diffusion -Movement of molecules across a semi-permeable membrane with a protein - no energy required

11 Effect of Water on RBC

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