Chapter 5: part 1

  1. The three major regions of the skin are the __________, ___________, and ___________.
    Epidermis, dermis, and hypodermis
  2. What is the superficial region of the skin?
  3. What is the middle region of the skin?
  4. The deepest layer is the ____________.
  5. The hypodermis is also know as the _____________ layer.
  6. What layer is not technically part of the skin?
  7. The hypodermis is mostly ___________.
  8. The epidermis is ____________.
  9. What kind of tissue is the epidermis made of?
    Stratified squamous epithelium
  10. What are the 4 cells of the epidermis?
    kearatinocytes, melanocytes, epidermal dendritic cells, and tactile cells
  11. What does keratinocytes produce?
    fibrous protein keratin
  12. What does melanocytes produce?
    pigment melanin
  13. 10-25% of melanocytes is located in the _________ _________.
    lower epidermis
  14. Epidermal dendritic cells are also known as ___________ cells.
  15. Epidermal dendritic cells are macrophages that help activate the __________ ___________.
    Immune System
  16. Tactile cells are also known as __________ cells.
  17. What are tactile cells?
    Touch Receptors
  18. Name the layers of the sking in order from the top to bottom:
    stratum corneum, stratum granulosum, stratum spinosum, and stratum basale.
  19. What layer?
    Several layers of keratinocytes unified by desmosomes. Cells contain thick bundles of intermediate filaments made of pre-keratin.
    Stratum spinosum
  20. What layer?
    Most superficial layer; 25-30 layers of dead cells represented only by flat membranous sacs filled with keratin. Glycolipids in extracellular space.
    Stratum corneum
  21. What layer?
    Deepest epidermal layer; one row of actively mitotic stem cells; some newly formed cells become part of the more superficial layers. See occasional melanocytes and epidermal dendritic cells.
    Stratum basale
  22. What layer?
    Three to five layers of flattened cells. organelles deteriorating; cytoplasm full of lamellated granules (release lipids) and keratohyaline granules.
    Stratum granulosum
  23. Stratum Basale is the deepest epidermal layer firmly attached to the __________.
  24. The basale layer is a single row of _______ _______.
    Stem cells
  25. The stratum basale is also known as what?
    Stratum germinativium
  26. What happens in the stratum germinativium?
    cells undergo rapid division
  27. Journey from basal layer to surface takes how long?
    25-45 days
Card Set
Chapter 5: part 1
Part 1 Integumentary