lab 4 Diffusion and Osmosis

lab 4 Diffusion and Osmosis - Lab 4: Diffusion and Osmosis...

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Lab 4: Diffusion and Osmosis September 23, 2010 Thursday, 8:00 Section
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Experiment Topics and Proposals Partners??? Read my notes Let me know if you have any questions Proposals are due next week!!! One page, single or double spaced State your hypothesis How you will conduct the experiment to test your hypothesis (materials and methods) How you will control your variables (identify independent and dependent variables)
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What is Diffusion? Substances moving from areas of high concentration to areas of low concentration Bottle of perfume Drop of Iodine
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What is Osmosis? A specific kind of diffusion - It occurs in all cells Water moves across a semi-permeable membrane
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What is Osmosis? A specific kind of diffusion - It occurs in all cells Water moves across a semi-permeable membrane Cell membrane - what can get through it? What can’t? - The direction that water moves depends on the solution. .. In our lab, dialysis tubing lets water through, but not larger molecules like salt or sugar
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Osmosis Water is pulled to the side of the membrane that is more heavily concentrated with the solute (green blobs) http://www.biologycorner.com/bio1/diffusion.html#
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This note was uploaded on 12/16/2010 for the course BIO 100 taught by Professor Mclenehan during the Fall '08 term at San Diego State.

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lab 4 Diffusion and Osmosis - Lab 4: Diffusion and Osmosis...

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