chapter 5

  1. What two parts make up the integumentary system?
    Cutaneous membrane (skin) and accessory structure
  2. What two components does the cutaneous membrane have?
    Outer epidermis and inner dermis
  3. What makes up the outer epidermis?
    A superficial epithelium
  4. What makes up the inner dermis?
    Connective tissue
  5. What makes up the accessory structures?
    Hair, nails, and exocrine glands
  6. How many strata (layers) of keratinocytes are in thick skin?
  7. What two pigments influence skin color?
    Carotene and Melanin
  8. Where does vitamin D3 come from?
    UV radiation
  9. What two organs convert vitamin D3 into calcitriol?
    Liver and kidney
  10. What aids in the absorption of calcium and phosphorus?
  11. What causes rickets?
    Insufficient Vitamin D3
  12. What function does elastic fibers have?
    It permits stretching and then recoils to original length
  13. What stabilizes the skin?
    The subcutaneous layer or hypodermis
  14. What type of muscle is Arrector Pili?
    and involuntary smooth muscle
  15. What does the Arrector pili do in the body?
    It causes the hair to stand up and produces "goose pimples"
  16. What occurs in a deep epidermal fold near the bone?
    nail production
  17. Where does nail production occur?
    In the nail root
  18. What's the first response of injury?
  19. What happens in step 4 of the healing process?
    Scar tissue is formed
  20. What produces scar tissue?
  21. What is inflexible and fibros that occurs when there is injury to the integument?
    Scar tissue
  22. What produces white hair?
    decreased melanocyte ACTIVITY
  23. What causes wrinkles?
    The reduction of elastic fibers
Card Set
chapter 5
test 2 chapter 5