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OSMOSIS!<br />Class Notes<br />Monday, Sept. 20, 2010<br />
Remember: What is the difference between diffusion and osmosis?<br />Diffusion is:<br />the movement of molecules from whe...
Osmosis<br />Why is it important?<br />Cells contain water molecules and most cells are surrounded by water molecules<br /...
Hypertonic solution<br />When more molecules of water leave the cell than enter<br />
Hypotonic solution<br />When more molecules of water enter the cell than leave<br />
Isotonic solution<br />Iso = “the same”<br />When molecules of water are moving in and out of the cell in equal amounts<br />
Osmosis!
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Osmosis!

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Osmosis!

  1. 1. OSMOSIS!<br />Class Notes<br />Monday, Sept. 20, 2010<br />
  2. 2. Remember: What is the difference between diffusion and osmosis?<br />Diffusion is:<br />the movement of molecules from where there are many to where there are few<br />Happens in all cells!<br />Osmosis is: <br />Diffusionof WATER across a cell membrane<br />
  3. 3. Osmosis<br />Why is it important?<br />Cells contain water molecules and most cells are surrounded by water molecules<br />If cells aren’t surrounded by mostly pure water, water will diffuse OUT.<br />3 different types of osmosis:<br />Hypertonic<br />Hypotonic<br />Isotonic<br />
  4. 4. Hypertonic solution<br />When more molecules of water leave the cell than enter<br />
  5. 5. Hypotonic solution<br />When more molecules of water enter the cell than leave<br />
  6. 6. Isotonic solution<br />Iso = “the same”<br />When molecules of water are moving in and out of the cell in equal amounts<br />

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