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The Cell ppt presentation


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The Cell ppt presentation

  1. 1. Ch2: The Cell DOWNLOAD THIS SLIDE For more slides click here
  2. 2. <ul><li>Structure (and importance) of cell membrane </li></ul><ul><li>Structure (and function) of organelles </li></ul><ul><li>Interconnections between cells to maintain structural stability in body tissues. </li></ul>Key Points:
  3. 3. Anatomy of a typical cell <ul><li>Cell membrane </li></ul><ul><li>Cytoplasm </li></ul>membranous organelles non-membranous organelles cytosol
  4. 4. What else is also part of the cell membrane ?
  5. 5. Cell membrane (plasma membrane, plasmalemma )
  6. 6. Non-membranous Organelles <ul><li>Cytoskeleton </li></ul><ul><li>Microvilli </li></ul><ul><li>Cilia, centrioles, flagellum </li></ul><ul><li>Ribosomes </li></ul>
  7. 7. Cytoskeleton <ul><li>4 major components: </li></ul><ul><li>Microfilaments (mostly actin) </li></ul><ul><li>Intermediate filaments </li></ul><ul><li>Thick filaments (composed of myosin subunits) </li></ul><ul><li>Microtubules (composed of tubulin subunits) </li></ul><ul><li>Fu: support & movement of cellular structures & materials </li></ul>
  8. 9. 2 centrioles direct formation of mitotic spindle In 9+0 array
  9. 10. Cilium - Cilia <ul><li>Compare to microvilli and flagellum </li></ul>In 9+2 array
  10. 11. Ribosomes 60% RNA + 40% ________ workbench for __________ Fixed vs, free ribosomes
  11. 12. Membranous Organelles Names and functions ?
  12. 13. Nucleus
  13. 14. Mitochondrion / -a
  14. 15. smooth & rough ER Chambers = cysternae Function: Synthesis  Storage  Transport
  15. 16. Golgi Apparatus vesicles come from ? Packaging and shipping of proteins Cell membrane renewal
  16. 17. Lysosomes
  17. 18. Intercellular Attachments <ul><li>channel proteins (connexons) interlock and form pores </li></ul><ul><li>abundant in cardiac and smooth muscle </li></ul>1) Gap Junctions
  18. 19. 2) Tight Junctions <ul><li>Interlocking membrane proteins </li></ul><ul><li>Found near surface of cells lining the digestive tract. Explain! </li></ul>
  19. 20. 3) Desmosomes <ul><li>Proteoglycan layer reinforced by transmembrane proteins (cell adhesion molecules or CAMs) </li></ul><ul><li>Belt, button and hemidesmosomes </li></ul><ul><li>Found in superficial layers of skin </li></ul>
  20. 21. The End