catabolism is the type of chemical digestion that occurs in the stomach.
catabolism is the type of chemical digestion that occurs in the stomach.
what type of chemical digestion occurs in the stomach?
catabolism
protein digestion occurs in the stomach and duodenum in which 3 main enzymes, pepsin secreted by the stomach and trypsin and chymotrypsin secreted by the pancreas, break down food proteins into polypeptides that are then broken down by various exopeptidases and dipeptidases into amino acids. the digestive enzymes however are mostly secreted as their inactive precursors, the zymogens. for example, trypsin is secreted by pancreas in the form of trypsinogen, which is activated in the duodenum by enterokinase to form trypsin. trypsin then cleaves proteins to smaller polypeptides.









































section::::breakdown into nutrients.:fat digestion.
digestion
digestion is the first step to lipid metabolism, and it is the process of breaking the triglycerides down into smaller monoglyceride units with the help of lipase enzymes. digestion of fats begin in the mouth through chemical digestion by lingual lipase. ingested cholesterol is not broken down by the lipases and stays intact until it enters the epithelium cells of small intestine. lipids then continue to the stomach where chemical digestion continues by gastric lipase and mechanical digestion begins (peristalsis). the majority of lipid digestion and absorption, however, occurs once the fats reach the small intestines. chemicals from the pancreas (pancreatic lipase family and bile salt-dependent lipase) are secreted into the small intestines to help breakdown the triglycerides, along with further mechanical digestion, until they are individual fatty acid units able to be absorbed into the small intestine's epithelial cells. it is the pancreatic lipase that is responsible for signaling for the hydrolysis of the triglycerides into separate free fatty acids and glycerol units.
lipid metabolism