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brush border |
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border /bor·der/ (bor´der) a bounding line, edge, or surface. brush border a specialization of the free surface of a cell, consisting of minute cylindrical processes (microvilli) that greatly increase the surface area. vermilion border the exposed red portion of the upper and lower lips.
brush border, microvilli on the free surfaces of certain epithelial cells, particularly the absorptive surfaces of the intestine and the proximal convoluted tubules of the kidney. Brush Border A specialized portion of the free or apical aspect of certain epithelial cells—e.g., of the GI tract—consisting of closely packed microvilli that facilitate absorption; brush border cells line the luminal surface of the intestine and proximal convoluted tubules of the kidneys; the BB contains absorptive microvilli and glycocalyx—which is rich in hydrolytic enzymes border [bor´der] a bounding line, edge, or surface. brush border a specialization of the free surface of a cell, consisting of minute cylindrical processes (microvilli) that greatly increase the surface area. ![]() Brush border, characterized by closely packed microvilli. From Dorland's, 2000. vermilion border the exposed red portion of the upper and lower lips.
brush border a specialization of the free surface of a cell, consisting of minute cylindrical processes (microvilli) that greatly increase the surface area. brush border enzymes
include maltase, lactase, α-dextrinase and peptidases. Deficiencies of these enzymes may be primary or, more often, secondary to other intestinal disease. brush border Physiology A specialized portion of the free or apical aspect of certain epithelial cells–eg, of the GI tract, consisting of closely packed microvilli that facilitate absorption; brush border cells line the luminal surface
of the intestine and proximal convoluted tubules of the kidneys; the BB contains absorptive microvilli and glycocalyx–which is rich in hydrolytic enzymes
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