Diffusion Transport

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Diffusion Transport

  1. 1. Launch <ul><li>Which way will the water go? </li></ul><ul><li>The solution of the environment around the cell is ___________ compared to the solution inside of the cell. </li></ul>HYPOTONIC 65% H 20 35% solute 80% H20 20% solute
  2. 2. <ul><li>We look at the concentrations of water (solvent) to determine water flow. </li></ul><ul><li>H20 flows from high to low </li></ul><ul><li>We look at the solute concentration to determine hypotonic, hypertonic, and isotonic </li></ul><ul><li>Hypertonic means your solute concentration is higher than another </li></ul><ul><li>Hypo tonic means your solute concentration is lower than another </li></ul><ul><li>Isotonic means your solute concentration is the same as another </li></ul>
  3. 3. Quiz Tomorrow <ul><li>Cell Membrane Structure </li></ul><ul><li>Phospholipids </li></ul><ul><li>Osmosis </li></ul><ul><li>Passive and Active Transport </li></ul>
  4. 4. Quiz Averages <ul><li>B1- 8 80% </li></ul><ul><li>B2- 8.2 82% </li></ul><ul><li>B3- 9 90% </li></ul><ul><li>B5- 9.2 92% </li></ul>
  5. 5. Objective <ul><li>I will understand the ways that different things cross the cell membrane to get IN and OUT of the cell. </li></ul>
  6. 6. Osmosis Review <ul><li>What is osmosis? Write down a simple description in your own words in your notes. </li></ul><ul><li>Hint: what is moving? where is it moving? what about the concentration is important? </li></ul>95% Water 5% Water Water Membrane
  7. 7. Simple Diffusion <ul><li>Movement across the membrane from HIGH to LOW concentrations </li></ul>
  8. 8. Facilitated Diffusion <ul><li>facilitate = help along. diffusion that needs a little help </li></ul><ul><li>Three ways with the cell membrane: </li></ul><ul><ul><li>Protein Carriers </li></ul></ul><ul><ul><li>Endocytosis </li></ul></ul><ul><ul><li>Exocytosis </li></ul></ul>
  9. 9. Protein Carriers <ul><li>Proteins that help move medium sized molecules from high concentration to low concentration across the cell membrane </li></ul><ul><li>Tunnels living in the membrane that help move things through </li></ul>
  10. 10. Endocytosis/Exocytosis <ul><li>Large molecules (like sugars) ENTER/EXIT the cell by creating a little membrane pocket around the molecule and absorbing that pocket (vesicle) </li></ul>
  11. 11. Endocytosis and Exocytosis <ul><li>http://www.youtube.com/watch?v=s0p1ztrbXPY&feature=related </li></ul><ul><li>http://www.youtube.com/watch?v=HndmASfmI8Y </li></ul>
  12. 12. Passive Transport <ul><li>Movement across the membrane that is easily done without energy </li></ul><ul><li>OSMOSIS, SIMPLE AND FACILITATED DIFFUSION </li></ul><ul><li>Passive = pass right on through </li></ul>
  13. 13. Active Transport <ul><li>The ability of a cell to move particles from region of LOW to HIGH </li></ul><ul><li>This requires energy from the cell </li></ul><ul><li>This is called ACTIVE Transport = movement across the membrane that is easily done but with energy (ATP) </li></ul><ul><li>http://www.youtube.com/watch?v=STzOiRqzzL4 </li></ul>

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