01:119:116 Lecture Notes - Lecture 23: Thiamine, Lymphatic System, Glycerol

• School: Rutgers University
• Department: Biological Science
• Course: 01:119:116
• Professor: Gregory Transue

Document Summary

All animals are heterotrophs: four stages of food processing, ingestion. Types: digestion, absorption-cells take up molecules, elimination-undigested passes out of system, digestive compartments, intracellular digestion, extracellular digestion-breakdown in compartments. Human digestive system: components, food processing prior to stomach, prior to ingestion, oral cavity=ingestion. Gets bolus into stomach and moves food throughout: pharynx, esophagus, stomach-very elastic-2 liter, food processing in stomach. Parietel cells-atp driven pump h+ into lumen and diffuse cl- into lumen. Now in stomach lumen h+ & cl hcl. Exits stomach through pyloric sphincter into: food processing in small intestines, small intestine (si) Breaks internal pep bonds at specific sites into smaller polypeptides-not aa"s. Ph 2, small polypeptides, mucus, smaller carbs and some undigested material. 6 meters- thin diameter (hence small: from pancreas (2)- pancreatic trypsin and chymotrypsin, plus 3 from si. Aminopeptidase-starts at amino acid: oral cavity-salivary amylase, stomach-none, small intestines, proteins. Polypeptides-> amino acids: oral cavity-none, stomach-pepsin-> breaks into short polypeptides, si-several area added.