A&P chpt 4 epith tis
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| Glands | Structures that produce fluid secretions; they are either attached to or derived from epithelia
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| basal lamina | aka basement membrane. a complex structure produced by the basal surface of the epithelium and the underlying connective tissue
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| Cell adhesion molecules (CAMs) | Transmembrane proteins which bind to each other and to extracellular materials
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| Intercellular cement | a thin layer of proteoglycans that contain polysaccharide derivatives; may bond membranes of adjacent cells
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| hyaluronan (hyaluronic acid) | polysaccharide derivatives contained inside of intercellular cement
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| cell junctions | specializd areas of the plasma membrane that attach a cell to another cell or to extracellular materials
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| occluding (tight) junctions | where the lipid portions of the two plasma membranes are tightly bound together by interlocking membrane proteins; adhesion belt forms a band that encircles cells and binds them to their neighbors
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| gap junction | where two cells are held together by interlocking junctional proteins called connexons
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| desmosome | where CAMs and proteoglycans link the opposing plasma membranes. very strong and can resist stretching and twisting
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| germinative cells | most stem cells that are located near the basal lamina, in a relatively protected location
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| endocrine glands | produces secretions, which are released directly into the surrounding interstitial fluid
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| exocrine glands | produce exocrine secretions, which are discharged onto an epithelial surface
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