PHYS20008 Lecture Notes - Lecture 17: Maltase, Sorbitol, Dietary Fiber
27 Jul 2018
School
Department
Course
Professor
Document Summary
* small intestine digestion (where majority of digestion occurs), absorption, propulsion. * digestive system accessory organs: pancreas (digestive enzymes, hormones) & liver (excretory, digestion, absorption) * digestion of proteins by pepsin (physically by breaking down tertiary/3d structure of proteins and chemically breaking down individual bonds forming short chain peptides & some individual amino acids) * formation of chyme by action of pepsin, actin & peristaltic contractions. * controlled entry of chyme to small intestine by pyloric sphincter. Feed back: regulate delivery of chyme from stomach (control rate of entry) Feed forward promote digestion, motility and utilisation of nutrients. Starch and carbohydrate breakdown begins in the mouth (by salivary amylase), fats start to break down in the mouth (lipase) and also a little in the stomach and proteins begin digesting in the stomach. Delivery of chyme to small intestine, feedback to inhibit stomach & feedforward to enhance digestion:
