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Chapter 6 A Tour of the Cell

Chapter 6 A Tour of the Cell. “Faith is a fine invention when gentlemen can see, but microscopes are prudent in an emergency.” Emily Dickinson. Question ?. Can cells be seen with the naked eye?. Light Microscope - LM. Light Microscope. Occular Lens. Objective Lens.

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Chapter 6 A Tour of the Cell

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  1. Chapter 6 A Tour of the Cell

  2. “Faith is a fine invention when gentlemen can see, but microscopes are prudent in an emergency.”Emily Dickinson

  3. Question ? • Can cells be seen with the naked eye?

  4. Light Microscope - LM

  5. Light Microscope Occular Lens Objective Lens Stage with specimen Light Source

  6. Magnification

  7. Resolution

  8. Limitations - LM

  9. Electron Microscopes

  10. TEM SEM

  11. Advantages

  12. Disadvantages

  13. Transmission Electron Microscope - TEM

  14. TEM Limitations

  15. Scanning Electron Microscope - SEM • Excellent views of surfaces. • Produces 3-D views. • Live specimens possible.

  16. Limitations • Lower magnifications than the TEM.

  17. Cell Biology or Cytology • Cyto = cell - ology = study of • Should use observations from several types of microscopes to make a total picture of how a cell is put together.

  18. Other Tools for Cytology

  19. Cell Fractionation

  20. Cell Fractionation

  21. Chromatography

  22. Electrophoresis

  23. History of Cells

  24. History of Cells • 1833 - Robert Brown, discovered the nucleus. • 1838 - M.J. Schleiden, all plants are made of cells. • 1839 - T. Schwann, all animals are made of cells. • 1840 - J.E. Purkinje, coined the term “protoplasm”.

  25. Cell Theory

  26. R. Virchow

  27. Types of Cells • Prokaryotic – • Eukaryotic -.

  28. Both Have:

  29. Prokaryotic Eukaryotic Nucleus

  30. Eukaryotic Prokaryotic

  31. Why Are Cells So Small?

  32. Basic Cell Organization

  33. AnimalCell

  34. Plant Cell

  35. Membrane

  36. Cytoplasm or Cytosol

  37. Organelle

  38. Organelles - function

  39. You must be able to:

  40. Nucleus

  41. Structure

  42. Nuclear Membrane

  43. Nuclear Pores

  44. Nucleolus

  45. Chromatin • Chrom: colored • - tin: threads

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