Active Transport


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Active Transport

  1. 1. Active Transport Ch 8
  2. 2. It is possible for particles to travel in the reverse direction across the membrane and have particles travel from an area of _______ concentration to an area of ______ concentration, but in order to counteract the force of diffusion the cell must expend energy. This process is called _______________. Low High Active Transport
  3. 3. Active transport is the movement of materials through a membrane ____________ a concentration gradient. Active transport requires ____________. AGAINST ENERGY
  4. 4. low concentration high concentration
  5. 5. The energy for active transport comes from ______ (Adenosine Triphosphate) generated inside mitochondria. ATP
  6. 6. This process requires specialized proteins , which are __________ proteins to bind with the particle and transport it. Carrier
  7. 7. Example: Sodium/Potassium pump in cell membranes.
  8. 9. Summary of Passive and Active Transport: & Osmosis GREAT PICTURE
  9. 10. Thus, far we have talked about the movement of __________ particles traveling across the membrane. Small
  10. 11. However, __________ particles are able to cross to and do so by any of these four active transport processes: Large <ul><li>Exocytosis </li></ul><ul><li>Endocytosis </li></ul><ul><li>Pinocytosis </li></ul><ul><li>Phagocytosis </li></ul>
  11. 12. Root Greek or Latin meaning Endo- inside, within Exo- external, out Phago- eat Pino- drink
  12. 13. Endo cytosis vs Exo cytosis: BOTH REQUIRE ENERGY Large particles are transported across the membrane in membrane bound vesicles.
  13. 14. <ul><li>Endocytosis : </li></ul><ul><li>The process where a cell surrounds and takes _____ material from its environments. </li></ul><ul><li>The particle does not pass through the membrane, it is simply __________ and enclosed </li></ul>engulfed in
  14. 15. <ul><li>  </li></ul><ul><li>Exocytosis : </li></ul><ul><li>The reverse process where materials are ______________ or secreted from a cell. </li></ul><ul><li>This is used to ____________ and secreted substances (hormones) produced by the cell. </li></ul>expelled rid wastes
  15. 16. <ul><li>When exocytosis is getting rid of cell wastes , the process is called ___________ </li></ul><ul><li>When exocytosis is pushing useful substances out of the cell , then the process is known as ____________ </li></ul>excretion secretion
  16. 17. Endocytosis Exocytosis
  17. 18. Pinocytosis vs. Phagocytosis Both take materials IN
  18. 19. <ul><li>Pinocytosis : </li></ul><ul><li>Pinocytosis is when the cell ________. </li></ul><ul><li>Pinocytosis deals with __________ . </li></ul><ul><li>Pinocytosis is a process that is happening all of the time . </li></ul><ul><li>The liquid is enclosed in “ vesicles ”, formed by invagination of the plasma membrane. These vesicles then move into the cell. </li></ul>pinches liquids (DRINKS)
  19. 20. Pinocytosis
  20. 21. <ul><li>Phagocytosis : </li></ul><ul><li>Phagocytosis is when the cell _______ </li></ul><ul><li>Phagocytosis deals with _________. </li></ul><ul><li>Once the vesicle has formed, it travels into the cytoplasm where it will fuse with ___________ that will kill and digest the engulfed material. </li></ul><ul><li>Phagocytosis is process the human body uses to destroy dead or foreign _______ . </li></ul>solids engulfs lysosome cells
  21. 22. Phagocytosis Used by white blood cells to engulf bacteria or infected cells
  22. 23. Phagocytosis movie Phagocytosis 2 movie
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