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Histology
Integument
| Question | Answer |
|---|---|
| integument is made up of... | skin+skin appendages |
| examples of skin appendages are... | sweat glands, sebaceous glands, hair follicles, nails |
| functions of skin | protection, prevent dehydration, wound healing, temperature regulation, synthesis of vitamin D, sensory reception |
| all of the appendages are located in this layer of the skin | dermis |
| thick skin is hairless and is located here... | palms of hands, soles of feet |
| thin skin is hairy and is located... | everywhere besides palms of hands and soles of feet |
| thick vs. thin skin has to do with the thickness of this layer of skin... | epidermis |
| name the five layers of the epidermis from bottom to top | stratum basale, stratum spinosum, stratum granulposum, stratum lucidum, stratum corneum |
| organelles of cells start to break down at this layer of skin | stratum granulosum |
| this intracellular junction anchors the stratum basale to the basement membrane... | hemidesmosome |
| this intracellular junction anchors skin cells to each other... | spot desmosomes |
| melanocytes are located in this cell layer | stratum basale |
| basal cell carcinoma occurs from an overgrowth of cells in this skin layer.. | stratum basale |
| melanocytes are derived from this embryologic structure | neural crest cells |
| melanocytes produce this | melanin |
| besides the production of melanin, another funciton of melanocytes is to... | transfer melanin granules to keratinocytes |
| this essential enzyme is needed to produce melanine, and albinos lack this enzyme | tyrosinase |
| true or false...albinos have no melanocytes | FALSE. Albinos have melanocytes, they are just not funcional. |
| this cellular junction in the stratum spinosum holds the skin together | desmosome |
| these are intermediate filaments composed of the protein keratin and attach to desmosomes | tonofilaments |
| these structures are membrane coated granules resleased by cells inthe stratum granulosum. they contain lipids that form a waterproof "teflon coat" on the skin that prevents water loss or excess water absorption | lamellar bodies |
| this layer is a clear, homogenous layer, and is ony present in thick skin and is considered a subdivision of the stratum corneum. | stratum lucidum |
| this layer of skin is mostly composed of keratin and remnants of dead cells. it is several layers thick to provide protection against abrasion and deternmines thick vs. thin skin | stratum corneum |
| these are star shaped cells with a halo found in the stratum spinosum and are derived from monocytes. | langerhans cells |
| these cells are located in the dermal/epidermal jubnction and is thought to be associated with sensory touch sensation | merkel cell |
| the dermis has this type of connection tissue | dense irregular |
| the two layers of the dermis are... | papillary and reticular layer |
| this structure is located in the dermal papillae and is associatd with touch sensation | meissner corpuscle |
| this structure is onion shaped and is a sense organ stimulatd by pressure found in deel layers of skin particularly around finger pads. it responds to vibration and pressure | pacinian corpuscle |
| this is the most numerous gland found in the skin and is a sweat gland. it is found all over the body | eccrine sweat gland |
| this sweat gland is found in "A" regions of the body: axillary, areolar, and anal region, and opens to hair follicles | apocrine sweat glands |
Created by:
aferdo01
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