PHSL 3051 Lecture Notes - Lecture 34: Parietal Cell, Critical Role, Submucosa
Document Summary
Responsible for churning and mixing the food contents with gastric juices to produce a substance called chyme. Primary role of the stomach is to regulate the rate at which the chyme enters the small intestine. Digestion of both proteins and fats is initiated in the stomach. Digestive activity in the stomach begins with the cephalic phase due to innervation of the vagus nerve! Hydrochloric acid is a strong acid that sterilizes and kills bacteria present in the food we consume. Drinking before eating will cause alcohol to be absorbed much faster, effects kick in more quickly. Eating after drinking causes a negative feedback mechanism (fatty foods) which slows rate of alcohol motility (theoretically, if simultaneously) An empty stomach is lined with folds called rugae that flatten as the stomach fills. Submucosa: blood vessels sit and stem from. Oblique layer (not part of classical mucosa layers) Covers different axis and provides different contraction directions to help.
