Describe the enzymes and other chemicals of digestion secreted by each digestive system organ 5. The first stage in fat digestion is emulsification by bile, then enzyme digestion proceeds in the second stage. In this part of the lab we will learn the stages of digestion for each type of food molecule, the important molecules and enzymes of each stage, and some the chemical tests for these molecules. Assessing Starch Digestion by Salivary Amylase Set up your experiment as described in your lab manual on p. 410. Amylase performs the first stage in the digestion of starch.
Amylase is secreted by the salivary glands and pancreas.
Disaccharidases are found on the microvilli of small intestine absorptive cells and in the lumen of the small intestine. We will not do this in the wet lab, but read the background discussion provided here and see below for the computer simulation of this activity. We will not do this in the wet lab, but read the background discussion provided here and see below for the computer simulation of this activity. We will not test for nucleic acids or nucleotides. The physical processes of digestion involve reducing large food chunks into small fragments These small fragments are then mixed with secretions of the digestive system containing digestive enzymes and other substances that convert the ingested food into a liquid slurry called chyme .