PHSI 208 Lecture Notes - Lecture 20: Active Transport, Electrochemical Gradient, Glut5
Document Summary
Smaller digestion products that diffuse into the un lled layer. Carbohydrates and proteins are transported directly into the capillary. There are two main amylases that are enzymes that breakdown chos. -responsible for breakdown of starch (large polysaccharides are broken down). -can form short oligosaccharides, maltriose (trimer of glucose), and maltose. Brush border enzymes: isomaltase and sucrase are examples. Do not require atp, but do require an electrochemical gradient. -gradient arises b. c you have the sodium/potassium atpase pump. In the end, you have low intercellular sodium. After cho digestion products are produced, they are then brought towards the basolateral membrane where they are then send into blood. Pancreatic enzyme secretion is dependent on the pancreatic enzyme cck. However, the secretin is the strongest stimulator of pancreatic and biliary secretion of bicarbonate. Cho and protein molecules must rst be broken down in lumen so they can then diffuse into the unstirred layer.
