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33 Cards in this Set
- Front
- Back
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the cytoplasm of epidermal cells includes intermedite filaments composed of tough structural protein
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keratin
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the dermal matrix contains the tough structural protein
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collagen
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the ----------- and the ---------- of the epidermis help the skin to resist infection
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relative dryness
acid mantle |
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the skin prevents dehydration because vesicles in the epidermal cells of the stratum---------- release a ----------- mixture that forms a water barrier
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granulosum
lipid |
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the skin contains sensory receptors for
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heat, cold, touch
texture, pressure, vibration and tissue injury |
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the skin functions in------------
(the homeostatic regulation of body temperature) |
thermoregulaton
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a decrease in blood vessel diameter is called ------------ and occurs when in dermal blood vessels when body temp gets too
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vasoconstiction
cold |
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when dermal blood vessels narrow in cold weather, the blood flow may be so FAST/SLOW that that the skin cells consume oxygen FASTER/SLOWER than the blood delivers it resulting in -----------
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slow
faster cyanosis- blueness of skin |
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vasodialation of dermal blood vessels INCREASES/DECREASES blood flow through the skin and results in-----
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increases
erythema- abnormal redness of skin |
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what microscopic organism, besides mold, feeds on exfoliated dead keratinocytes?
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house dust mites
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the skin functions in------------
(the homeostatic regulation of body temperature) |
thermoregulaton
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a decrease in blood vessel diameter is called ------------ and occurs when in dermal blood vessels when body temp gets too
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vasoconstiction
cold |
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when dermal blood vessels narrow in cold weather, the blood flow may be so FAST/SLOW that that the skin cells consume oxygen FASTER/SLOWER than the blood delivers it resulting in -----------
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slow
faster cyanosis- blueness of skin |
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vasodialation of dermal blood vessels INCREASES/DECREASES blood flow through the skin and results in-----
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increases
erythema- abnormal redness of skin |
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what microscopic organism, besides mold, feeds on exfoliated dead keratinocytes?
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house dust mites
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"the ability of the skin to absorb chemicals makes it possible to administer several medications transdermally." why is it possible when the epidermal water barrier prevents the absorption (as well as the loss) of water through the skin?
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the chemicals absorbed through the skin are lipid soluble
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the majority of epidermal cells
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keratinocytes
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found in stratum basale
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keratinocytes
melanocytes stem cells tactile cells |
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undifferentiated, dividing cells
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stem cells
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synthesize a black- brown pigment
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melanocytes
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touch receptors
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tactile cells
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macrophages
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dendritic cells
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the stratum corneum consists of up to 30 layers of these cells that have died
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keratinocytes
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the boundary between the epidermis and the dermis is histologically conspicuous. the upward extensions of the dermis into the epidermis are called
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dermal papillae
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the downward extensions of the epidermis into the dermis are called
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epidermal ridges
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the dermis and the epidermis interlock like corrugated cardboard to resist
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slippage of the epidermis over the dermis
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on the figertips, the upward extensions of the dermis are called---------- and leave-------
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friction ridges
fingerprints on things they touch |
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the superficial layer of the dermis is called the-------- and is composed of --------
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papillary layer
areolar connective tissue |
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the deep dermal layer is the ---------- and is composed of
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reticular layer
dense irregular connective tissue |
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the hypodermis IS/ IS NOT considered to be part of the skin. it is composed of ----------- and--------
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is not
areolar and adipose tissue connective tissues |
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another name for the hypodermis is the
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superficial fascia
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hypodermis composed predominantly of adipose tissue is called
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subcutaneous fat
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the hypodermis functions to
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-pads body
-binds skin to unerlying muscular layer -serves as an energy resevoir (specially adipose tissue) - provides thermal insulation (specifically the adipose tissue) |
