Karnataka PGET 2007 Anatomy MCQ Answer 03
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The villi increase the surface area of the small intestine to many times what it would be if it were simply a tube with smooth walls. In addition, the apical (exposed) surface of the epithelial cells of each villus is covered with microvilli (also known as a "brush border"). Thanks largely to these, the total surface area of the intestine is almost 200 square meters, about the size of the singles area of a tennis court and some 100 times the surface area of the exterior of the body.
Incorporated in the plasma membrane of the microvilli are a number of enzymes that complete digestion.
Tags: MCQ, Histology, Brush Border
Category: Karnataka PGET 2007 MCQs
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