Histology Sec 4 Connective tissue

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Histology Sec 4 Connective tissue
2012-12-02 19:11:27

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  1. What are the two major components of connective tissue?
    Extracellular matrix and cells
  2. What are the five major fuctions of connective tissue?
    • Support
    • Defense: physical (via hyaluronic acid) and Immunological
    • Repair
    • Storage (water, electrolites and lipids)
    • Transport (except in CNS)
  3. What are the major components of the matrix?
    • Ground Substance
    • Fibers
  4. What forms the ground substance?
    • Proteoglycans
    • hyaluronic acid
  5. What are the three types of fibers?
    • Collagen fibers
    • reticular fibers
    • elastic fibers
  6. What are the most common fibers that form oth tropocollagens?
    Types I, II, III
  7. What is the purpose of collagen fibers?
    add strength to connective tissue
  8. What is the dominant type of fiber found in tendons, ligaments, organ coverings, facia?
    collagen fibers
  9. What type of fibers are delicate and form fine networks?
    reticular fibers
  10. What type of fiber in the main fiber found in visceral organs (i.e., liver, kidney, spleen)?
    Reticular fibers
  11. What type of fibers are found in artery, veins, and ligamentum flavum?
    Elastic Fibers
  12. What are the two main classifications for connective tissue cells?
    • Fixed cells
    • wandering cells
  13. What is the most common type of connective tissue cells (true cells)?
  14. What are the inactive and active forms of fibrocytes?
    • Inactive = fibrocyte
    • Active = fibroblast (repair tissue)
  15. What type of cells is an adipocyte?
  16. What type of connective tissue cells originate in the bone marrow and migrate through the blood?
    Wandering cells
  17. What are the main types of wandering cells?
    • Macrophages
    • mast cells
    • lymphocytes
    • plasma cells
    • reticual cells
  18. What are the most prominant substances found in mast cells?
    • Histamine
    • heparin
  19. What type of wandering cell can differentiate into plasma cells?
  20. What disease is caused by a lack of collagen which causes blood capillaries to hemorrhage?
  21. What is the main functioin of fibrocytes and fibroblasts?
    repair damaged tissue
  22. Where is elastic tissue found?
    dermis, walls of veins and arteries
  23. What is the orientation of dense irregular and dense regular connective tissue?
    • Irregular =  no clear orientation, densley woven 3D network
    • Regular  = run parallel (tendons and ligaments)
  24. What are the characteristics of loose connective tissue?
    • cell rich
    • rich in vessels and nerves