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- WOW! The food is really good. Al though I wonder what is going to happen to the starch molecule when I chew it to when I excrete it?
- Hello there! I am the enzyme Amylase. Enzymes biological catalysts that speeds up reactions without using itself up. I help with the process of breaking down starch! Without us, rice and other starch products would take weeks to get absorbed!
- So what happens first when you chew it?Well the scientific term for this is ingestion its is the process of taking food in the mouth and breaking it down into smaller pieces.While the food is being mechanically broken down, the enzymes in saliva begin to chemically process the food as well. The combined action of these processes modifies the food from large particles to a soft mass that can be swallowed and can travel the length of the esophagus.
- The digestion of carbohydrates begins in the mouth. The salivary enzyme amylase begins the breakdown of food starches into maltose, a disaccharide. As the bolus of food travels through the esophagus to the stomach, no significant digestion of carbohydrates takes place. The esophagus produces no digestive enzymes but does produce mucous for lubrication. The acidic environment in the stomach stops the action of the amylase enzyme.
- The next step of carbohydrate digestion takes place in the duodenum. Recall that the chyme from the stomach enters the duodenum and mixes with the digestive secretion from the pancreas, liver, and gallbladder. Pancreatic juices also contain amylase, which continues the breakdown of starch and glycogen into maltose, a disaccharide. The disaccharides are broken down into monosaccharides by enzymes called maltases, sucrases, and lactases, which are also present in the brush border of the small intestinal wall. Maltase breaks down maltose into glucose
- In the rectum the processes that happen are:- Mechanical digestion- No chemical digestion except for bacteria- Absorption of ions, water minerals, vitamins, and small organic molecules produed by bacteria
- THE END!
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