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Mechanisms of Transport (Chapter 5)

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  1. Mechanisms of Transport(Chapter 5) Know: permeability, selectively permeable, plasmolysis, solute, solution Fig 5.2, 5.3, 5.5b, 5.7, 5.8, 5.13, 5.23, 5.24

  2. Two categories of cell transport • Passive Transportacross membranes does not require energy from the cell and includes three types. • Diffusion- • Osmosis-

  3. osmotic pressure

  4. Isotonic Env. Hypootonic Env. Hypertonic Env.

  5. Facilitated diffusion-

  6. Active Transport

  7. Five Kinds of Active Transport • Sodium/Potassium Pump(Figure 5.18 in text) http://www.brookscole.com/chemistry_d/templates/student_resources/shared_resources/animations/ion_pump/ionpump.html

  8. Sodium Potassium Pump

  9. Calcium Ion Pumps– • Proton Pumps – • Exocytosis –

  10. Endocytosis –

  11. Occurs in three ways. • phagcytosis • pinocytosis • receptor mediated endocytosis

  12. Cell Junctions • Involved in cell to cell transport, barriers in between cells, and structural support • 4 kinds • Gap junctions (animal cells)

  13. Gap junctions

  14. Plasmodesmata (plant cells)

  15. Plasmodesmata

  16. Desmosomes (animal cells)

  17. Desmosomes

  18. Tight junctions(animal cells)

  19. Tight junctions