Anatomy Chapter 5, Set 2

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Anatomy Chapter 5, Set 2
2013-10-17 23:10:23
Integumentary System

lecture slides Chapter 5
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  1. Hair thinning in both sexes
  2. Genetically determined and sex- influenced condition
    True or Frank baldness
  3. Caused by follicular response to DHT
    Male pattern baldness
  4. Chemical, physical, and biological barrier
  5. Functions of Integumentary System
    • *Protection
    • *Body Temp regulation
    • *Cutaneous sensation
    • *Metabolic Functions
    • *Blood Reservoir
    • *Excretion
  6. Body Temp regulation is accomplished by
    • *Dilation (cooling) and constriction (warming) of dermal vessels
    • *Increasing sweat gland secretions to cool the body
  7. Dilation and constriction of dermal vessels
    regulation of Body Temp
  8. Increasing sweat gland secretions to cool the body
    Body Temp regulation
  9. Exoreceptors sense touch and pain
    Cutaneous Sensation
  10. Synthesis of Vitamin D precursor molecule in dermal blood vessels
    Metabolic Functions
  11. Skin blood vessels store up to 5% of the body's blood volume
    Blood reservoir
  12. Limited amounts of nitrogenous wastes are eliminated from the body in sweat
  13. Most skin tumors are benign (do not metastasize)
    Skin cancer
  14. Risk factors for skin cancer
    • *Overexposure to UV radiation
    • *Frequent irritation of the skin
  15. Some skin lotions contain enzymes in liposomes that can fix damaged DNA
    Skin Cancer
  16. 3 major types of skin cancer
    • *Basal Cell Carcinoma
    • *Squamous Cell Carcinoma
    • *Melanoma
  17. Least Malignant, Most Common Skin Cancer
    Basal Cell Carcinoma
  18. Second most common skin cancer
    Squamous Cell Carcinoma
  19. Most dangerous Skin Cancer
  20. Stratum Basale cells proliferate and slowly invade dermis and hypodermis
    Basal Cell Carcinoma
  21. Cured by surgical excision 99% of cases
    Basal Cell Carcinoma
  22. Involves keratinocytes of stratum spinosum
    Squamous Cell Carcinoma
  23. Most Common on scalp, ears, lower lip, and hands
    Squamous Cell Carcinoma
  24. Good prognoses if treated by radiation therapy or removed surgically
    Squamous Cell Carcinoma
  25. Involves melanocytes
  26. Highly metastatic and resistant to chemotherapy
  27. Treated by wide surgical excision accompanied by immunotherapy
  28. Characteristics of Melanoma
    *ABCD rule*
    • A: Asymmetry; the two sides of the pigmented are do not match
    • B: Border exhibits indentation
    • C: Color is black, brown, tan, and sometimes red or blue
    • D: Diameter is larger than 6 mm (size of a pencil eraser)
  29. Heat, electricity, radiation, certain chemicals
  30. tissue damage, denatured protein, cell death
  31. Immediate threat from Burn
    Dehydration and electrolyte imbalance, leading to renal shutdown and circulatory shock
  32. Used to estimate the volume of fluid loss from burns
    Rule of Nine
  33. Type of burn

    Epidermal damage only
    *localized redness, edema(swelling), and pain
    First Degree Burn

    (Partial Thickness Burn)
  34. Type of Burn
    Epidermal and upper dermal damage
    *Blisters appear
    Second Degree Burn

    (Partial Thickness Burn)
  35. Type of Burn

    Entire thickness of skin damaged
    *Gray-white, cherry red, or black
    *No initial edema or pain (nerve endings destroyed)
    *Skin grafting usually necessary
    Third Degree Burn

    (Full Thickness Burn)
  36. Severity of Burns

    Critical if:
    • *greater then 25% of body has second degree burns
    • *greater than 10% of body has third degree burns
    • *Face, Hands, or feet bear third degree burns