Ch. 6 Skin Color

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Author:
flying_this_fortress
ID:
262128
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Ch. 6 Skin Color
Updated:
2014-02-15 16:15:02
Tags:
dermatology exam boerboom skin
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Skin Color flashcards
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  1. What is the most significant factor in skin color?
    Melanin, produced by melanocytes. accumulates in stratum basale and spinosum
  2. People of different skin colors have the same number of melanocytes however dark-skinned people...
    Produce greater quantities of melanin

    melanin granules in keratinocytes are more spread out than tightly clumped

    melanin breaks down more slowly
  3. People of different skin colors have the same number of melanocytes however for light-skinned people...
    Melanin is clumped near keratinocyte nucleus, so it imparts less color to cells

    Melanin breaks down more rapidly; little of it is seen beyond stratum basale, if even there
  4. Exposure to UV rays of sunlight stimulates...
    • ...melanin synthesis, thus darkening
    • skin
  5. Hemoglobin, what is it and where is it found?
    Red pigment found in red blood cells

    Adds the reddish to pinkish hue in skin

    Skin is redder in places such as the lips where blood capillaries are closer to the surface
  6. Carotene - what is it and what does it come from?
    Yellow pigment acquired from egg yolks and yellow/orange vegetables

    If diet is high in these foods it concentrates in the stratum corneum and fat (hypodermis). Heel is thick with corneum therefore shows this color
  7. Colors for diagnosing people: What is Cyanosis?
    Blueness of the skin from lack of oxygen in the circulating blood

    Drowning, choking, lung disease (emphysema), cold
  8. Colors for diagnosing people: What is Erythmena?
    Abnormal redness due to dilated blood vessels in skin

    Exercise, sunburn, anger
  9. Colors for diagnosing people: What is Pallor?
    Pale color from so little blood flow through the skin that the white color of collagen in the dermis is visible

    Stress, anemia
  10. Colors for diagnosing people: What is Albinism?
    Genetic lack of melanin that results in white hair, pale skin, and pink eyes
  11. Colors for diagnosing people: What is Jaundice?
    yellowing of skin due to excess of bilirubin in blood

    bilirubin is converted hemoglobin which is supposed to be dumped in bile by the liver. So if the liver isn't working then it can back up.

    hepatitus
  12. Colors for diagnosing people: What is Hematoma?
    Bruise. mass of clotted blood showing through skin

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