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Where are carbs digested6/21/2023 The digestion of certain fats begins in the mouth, where lingual lipase breaks down short chain lipids into diglycerides. This condition is commonly known as lactose intolerance. Approximately half the adult population produces only small amounts of lactase and are therefore unable to eat milk-based foods. Lactase is an enzyme that breaks down the disaccharide lactose into its component parts, glucose and galactose, that are absorbed by the small intestine. Sucrose digestion yields the sugars fructose and glucose, which are readily absorbed by the small intestine. Sucrase is an enzyme that breaks down disaccharide sucrose, commonly known as table sugar, cane sugar, or beet sugar. This process produces the simple sugars glucose and maltose (two glucose molecules) that can be absorbed by the small intestine. During digestion, the bonds between glucose molecules are broken by salivary and pancreatic amylase, and result in progressively smaller chains of glucose. In humans, dietary starches are composed of glucose units arranged in long chains of polysaccharide called amylose. Trypsin then cleaves proteins into smaller polypeptides. ![]() ![]() Thus, trypsin is secreted by the pancreas in the form of trypsinogen, which is activated in the duodenum by enterokinase to form trypsin. The digestive enzymes, however, are secreted mainly as their inactive precursors, the zymogens. These enzymes break down food proteins into polypeptides that are then broken down by various exopeptidases and dipeptidases into amino acids. Chymotrypsin, secreted by the pancreas.Protein digestion occurs in the stomach and the duodenum through the action of three primary enzymes:
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