Term
| epidermis is keratinized stratified squamous epi. with which 4 distinct cell types? |
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Definition
1. melanocytes
2. keratinocytes
3. tactile epi. cells
4. dendritic cells |
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Term
what's another name for tactile epithelial cells?
what are they associated with
in which layer of epidermis is it? |
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Definition
merkel cells
sensory nerve endings
stratum basale
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Term
| large moles can develop into which cancer? |
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Definition
|
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Term
in stratum spinosum,
several layers of keratinocytes are united by what? |
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Definition
desmosomes
mitosis occurs less often in this layar than basal layer |
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Term
what layer of epidermis is INTERMEDIATE FILAMENT in?
what is it? |
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Definition
stratum spinosum
tension resisting protein pre-keratin |
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Term
tactile epithelial cells/melanocytes are in which layer of epidermis?
dendritic cells? |
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Definition
stratum basale
stratum spinosum |
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Term
| function of dendritic cells? |
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Definition
engulf foreign antigens that invate epidermis
generate immune response |
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Term
What does Stratum Granulosum?
consists of 1-5 layers of flattened keratinocytes |
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Definition
1. intermediate filaments
2. keratoyhyaline granules
3. lamellate granules
contain waterproofing glycolipid |
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Term
| what does the stratum corneum *horny layer* function as? |
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Definition
| protects skin against abrasion/penetration |
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Term
what contains fibroblasts, macrophages, mast cells
WBCs and collagen? |
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Definition
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Term
Hypodermis
areolar/adipose CT |
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Definition
anchors skin to other structures
helps insulate body
hypodermis can thicken with inc. adipose tissue |
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Term
| describe 1st, 2nd, 3rd degree burns |
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Definition
1st, only epidermis damaged
2nd, blister forms, no scar
3rd, damages all skin, permanent scar |
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Term
Function of edema?
It's a tissue response to skin injury inflam. |
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Definition
accumulation of fluid in tissue as local blood vessels become more permeable
-dilutes toxins secreted by pathogen
-brings WBC/antibodies from blood to flight infection
-brings nutrients/clotting factors from blood |
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Term
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Definition
regeneration
inflammation
fibrosis
organization |
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Term
| what do sebaceous glands secrete? |
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Definition
sebum - oily substance = lubricates hair/skin
simple alveolar glands
holocrine secretion - entire cell break up to form secretion
most r associated with hair follicle |
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Term
| apocrine sweat glands function as? |
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Definition
| pheromone - mate attraction |
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