ANFS140 Chapter Notes - Chapter chap 5: High Endothelial Venules, Simple Squamous Epithelium, Cell Adhesion Molecule
23 May 2016
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Document Summary
They are closely apposed and adhere to one another by specific cell-to-cell adhesion molecules that form cell junctions. Exhibit functional and morphologic polarity, i. e. diff. functs. Are associated w/ 3 distinct morphologic surface domains: Basal domain: properties are each determined by specific lipids and integral membrane proteins. Basal surface is attached to an underlying basement membrane non- cellular, protein-polysaccharide-rich layer diagram of small intestine absorptive epithelial cells junctional complex provides adhesion bw. Adjoining cells and separates luminal space form intercellular space, limiting movement of fluid bw. Epithelioid cells are derived from progenitor mesenchymal cells; immature cells may have had free surface but mature ones don"t. Epithelioid organization is typical of most endocrine glands such as tissues in the testis, the ovaries, the pancreas, the adrenal gland, and the anterior lobe of the pituitary gland: epithelium creates a selective barrier bw. And underlying connective tissue: epithelial investment functs.
