Processes in the Small Intestine

Starch digestion in the small intestine Illustrates many processes that we have learned about Membrane permeability Catalysis Without a catalyst the reactions to digest starch would happen at very slow rates Enzyme specificity

Starch digestion in the small intestine Illustrates many processes that we have learned about Membrane permeability Catalysis Enzyme specificity Three enzymes in villi membranes break the 1,6 bonds and the 1,4 products; dextrinase, maltase, glucosidase Salivary amylase begins the digestion. Most starch digestion happens in the small intestine with enzyme secretions from the pancreas. 1,4 bonds broken by pancreatic amylase These small sections are now broken down into maltose and maltotriose Glucose

Starch digestion in the small intestine Illustrates many processes that we have learned about Membrane permeability Catalysis Glucose is absorbed via: co-transport with sodium ions into the interstitial fluid via facilitated diffusion through large membrane pores into capillaries. Enzyme specificity

Predict whether the bag will gain or lose mass during the experiment. Cola drinks contain a mixture of substances with different particle sizes. This cola contains glucose, phosphoric acid, and caramel (a complex carbohydrate added to produce a brown color). Predict which substances will diffuse out of the bag, with reasons for your prediction. Predict whether the bag will gain or lose mass during the experiment. Cola, left to go flat before being put in a tube Bags made of dialysis tubing Water