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Two major forms of epithelium: |
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two types of glandular epithelium: |
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epithelial cells are bound together by |
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epithelial cells are arranged |
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epithelium has how much extra cellular space? |
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the basal surface rests on the |
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which surface is specialized? |
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epithelial tissue displays high or low mitotic activity? |
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Definition
structural support and selective barrier for epithelium |
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components of basal lamina |
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Definition
collagen IV, glycoproteins, proteoglycans secreted by epithelial cells |
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how is the basal lamina connected with the underlying connective tissue? |
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Definition
type VII anchoring fibrils |
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Definition
layer under the basal lamina composed of reticular fibers from connective tissue fibroblasts |
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Definition
just below apical end of cell. permeability barrier against molecular movement across epithelial sheets. |
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just below apical end of cell. permeability barrier against molecular movement across epithelial sheets. |
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Definition
connections between adjacent cells, allow passage of molecules, signaling |
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Definition
link cytoskeletons for structural integrity |
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Definition
attach cells to extracellular matrix. |
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Definition
increase surface area, trap nutrients |
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Definition
non-motile. Increase surface area. |
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Definition
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purpose of surface epithelium (6) |
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Definition
protection, absorption, excretion, surface transport, digestion, lubrication |
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where is simple squamous epithelium? |
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Definition
lining serous cavities: peritoneum, pleura, pericardium (mesothelial); lining heart, blood and lymph vessels (endothelial) |
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Where is simple cuboidal epithelium found? |
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Definition
ducts of mammary glands, collecting ducts of kidneys. |
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Where is simple columnar epithelum found? |
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Definition
GI tract, genitourinary tract, resp tract. |
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What are three features of simple columnar epithelial cells? |
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Definition
nucleus is oval and basal; striated border; ciliated in portions of resp. and urinary tract. |
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where is pseudostratified epithelium found? |
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Definition
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Where is stratified keratinized squamous epithelium found? |
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Definition
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where is stratified non-keratinized squamous epithelium found? |
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Definition
in the mouth, esophagous, anal canal |
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where is stratified cuboidal epithelium found? |
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Definition
large excretory ducts of glands -- salivary and mammary |
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where is stratified transitional epithelium found? |
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Definition
bladder, ureters, part of urethra |
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In stratified sqamous epithelium, of what type are the deeper layers? |
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one or a group of epithelial cells modified to synthesize and secrete molecules into the extracellular space. |
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Definition
products released to surface |
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ductless, products released btween cells, diffuse into capillaries. |
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glands in the large intestine are |
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glands in the kidney and testes are |
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glands in the pancreas and mammae are |
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many secretory units that empty into branching ducts. |
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single celled mucous glands. |
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in goblet cells, the nuclei are |
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Definition
pressed to the base by the acidophilic secretory granules filling the cells |
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pancreatic acinar cells secrete by what type and mode? |
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the acinar mandibular salivary glands secrete by what type and mode? |
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Definition
mucous, serous, merocrine |
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sebaceous glands secrete by what mode? |
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sweat glands secrete by what mode? |
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