gether, they create pepsin. The pepsin works to breakdown the two grams of protein present in the Cheetos. Hormones are also present in the stomach and aid in the digestion process. The hormone, gastrin, increases the secretory activity of gastric glands. In the stomach, some salt from the Cheetos is absorbed through the wall. The Cheetos that entered the stomach has now been transformed into a semifluid paste called chyme. Peristaltic waves push the chyme out of the stomach through the pyloric sphincter into the duodenum of the small intestine. Now in the duodenum, accessory organs add their secretions to the chyme. First is the pancreas. It adds pancreatic juice to the chyme, which contains many enzymes that digest carbohydrates, fats, nucleic acids, and proteins. Pancreatic amylase begins to split the last of the fifteen grams of carbohydrates into double sugars. The pancreatic lipase breaks down the ten grams of fat into fatty acids and glycerol. There are three other protein-splitting enzymes called trypsin, chymotrypsin, and carboxypeptidase. These break the bonds between particular combinations of amino acids in proteins. The hormone, secretin, controls the secretion of pancreatic juices. When CCK and secretin join together, they slow down the activity of the stomach. The liver is another important accessory organ. It stores many substances, glycogen, iron, and vitamins A, D, and B12. It also helps maintain the normal concentration of blood glucose. The liver produces bile, which is important to digestion. The gall bladder stores, strengthens, and secretes the bile. CCK stimulates the gall bladder to secrete bile. Bile salts aid digestive enzymes. They break down fat globules into smaller droplets and enhance absorption. The Cheetos, in the form of chyme, are now traveling through the small intestine. In the small intestine, sucrase, maltase, and lactase split the double sugars into simple sugars, and intes...
