brush border

Consists of microvillae which serves to enhance cell surface area available for absorption of small molecules. Brush border is found in: 1) intestinal mucosa 2) proximal convoluted tubule of kidney The microvillae are about 1-1.5 uM in length & 0.03 uM in width by electron microscopy. Mucopolysaccharides & alkaline phosphatase are associated with the brush border.

References

Clyman B, in: UCLA Intensive Course in Geriatric Medicine & Board Review, Marina Del Ray, CA, Sept 12-15, 2001