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ch. 5 integumentary system

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epidermis is made of up this kind of tissue   epithelial  
dermis' made up of these tissue types   connective, nerve & muscle  
__ makes up 90% of cells in the epidermis   kerantinocytes  
provide melanin pigment   Menanocytes  
cells that come from bone marrow   langerhan cells  
theses cells provide immunity   langerhan cells  
these cells form touch receptors   merkel cells  
merkel cells lay in the ___ section of the epidermis   deepest layer  
___ layer contains dark staining keratohyalin granules   stratum granulosum  
deepest single layer of cells   stratum basale  
also called stratum germinativum   stratum basale  
combination of merkel cells, melanocytes, keratinocytes & stem cells that repediately divide   stratum basale  
in the stratum basale layer of the epidermis cells attach to each other & to basement membrany by _______   desmosomes & hemidesmosomes  
8-10 cell layers held together by desmosomes   stratum spinosum  
in this layer melanin taken in by phagocytosis from nearby melanocyes   stratum spinosum  
3-5 layers of flat dying cells showing nuculear deneration   stratum granulosum  
this layer contains lamellar granules that release lipids that repels water   stratum granulosum  
this layer is only seen in thick skin   stratum lucidum  
3-5 layers of flat dead cells contains precusor to keratin   stratum lucidum  
25-50 layers flat dead cells filled w/ keratin and surrounded by lipids   stratum corneum  
layer of epidermis that friction stumulates callus formation   stratum corneum  
stem cells divide to produce ___   keratinocytes  
Af keratinocytes are pushed up towards the surface, they fill with ___   keratin  
It takes __ weeks for a cell to travel through all the layers   4  
This hormone can speed up the cells journey through the epidermis   epidermial growth factor (efg)  
These compose the dermis   collagen, elastic fibers, fibroblasts, macrophages & fat cells  
this layer contains hair follicles, glands, nerves & blood vessels   dermis  
two major regions of dermis   papillary & reticular regions  
anchor epidermis to dermis, contain capillaries that feed epidermis& contains meissner's corpuscles are functions of the __ region   papillary region  
the papillary region contains ___ &makes up the __ of the dermis   dermal papillae (finger like projections) to 20%  
the recticular region is made up of this type of tissue   connective  
This region is packed with oil glands, sweat glands ducts & hair follicles   recticular region  
this region provides strength extensibility and elasticity to skin (strech marks)   recticular region  
epidermal ridges form in fetus as epidermis conforms to dermal papillae (increasese gripi of hands)which region does this occur in?   recticular  
melanocytes convert ___ to melanin   tyrosine  
inherited lack of tyrosinase   albinism  
autoimmune loss of melanocytes in areas of the skin (white patches)   vitiligo  
This precursor to vitamin A is found in stratum corneum & dermis   carotene  
red oxygen carrying pigment in bloodcells   hemoglobin  
yellowish color to skin and whites of eyes buildup of bilirubin in blood from liver disearse   jaundice  
bluish color in nail bds aand skin hemoblobin depleted of oxygen looks purple blue   cyanotic  
redness of skin due to enlargement of capillaries in dermis during inflammation & infection it burn   erythema  
cells sink inwards during development to form:   hair, oil glands, sweat glands (sudoriferous, & nails  
core of the hair   medulla  
daughter cells farther from the center of the hair matrix for the _____ (intermed layer)   cortex  
surface of hair   cuticle  
CS round in straigh hair oval in curly   no answer  
this surounds the hair root and the deeper portion of the shaft. produced by cells at the periphery of hair mtris   internal root sheath  
extends from skin surface to hair matrix cell layers foun in the superficial epidermis   external root sheath  
thickened basal lamina wrapped in dense connective tissue sheath   glassy membrane  
base of hair follicle is ___ (germindal cell layer)   hair bulb (surrounds hair papillia)  
these detect hair movement   hair root plexus  
smooth muscle in dermis contracts with cold/fear gOoOooOosebumps form as hairs pulled virtically   arrector pili  
in the growth stage the matrix cells at the base of hair root produce ____   length of hair  
The resting stage of hair last for ___ and folicle atrophies   3 months  
blonde & red hair contain melanin with ____   iron and sulfer  
oil glands: secretory portion in the dermis, most open onto hair shafts   sebaceous gland  
this keeps hair soft, is composed of cholestoerol, proteins fats & salts, and inhibits growth of bacteria   sebum  
sudoriferous glans that are in most areas of the skin, secrete portion in dermis w/ duct to serfact, regulatebod temp   eccrine glands  
found in the armpit and pubic region, secretes entire cell to cause lager oder,   apocrine glands  
these glands produce waxy secretion in ear canal   ceruminous glands  
nails are composed of tightly packed _____cells   keratinized  
the lunula appears white due to thickedned ____   stratum basale  
cuticle (eponychium) is made up of this   stratum corneum  
visible portion of nail pink due to ___   underlying capillaries  
another name for cuticle   eponychium  
nails grow this fast   1mm/week  
thick skin lacks this   hair folicles & sebaceous glands  
in which layer of the skin does cell division occur?   stratum germinativum  
which layer consists of loose connective tissue & contains capiliaries & sensory neurons   papillary region  
this region consists of dense irregular connective tissue and bundles of colagen fibers   recticular region  
pressure sores   decubitus ulcers  
eoudernus develops from this germ layer   ectodermal  
dermis develops from this gem layer   mesodermal  
fetal hair   lanugo  
slipper coating of oil and slothed skin present at birth   vernix caseosa  
non-life threatening skin cancer   basal cell carcinoma & squamous c ell carcinoma  


   





 
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