ASCI 001 Lecture Notes - Lecture 13: Brush Border, Rectum, Hydrolysis
Document Summary
Bile salts from liver act in intestine (detergent activity) Physical, chemical, and enzymatic processes that prepare a feedstuff for absorption. Chemical acid (hcl) in stomach or abomasum. Enzymatic enzymes to break down chemical bonds. (cid:862)mo(cid:374)ogastri(cid:272)(cid:863) type includes avian simple stomach leading to intestine also hind-gut or cecal fermentation. Ruminant or ruminant-like systems (cid:862)polygastri(cid:272)(cid:863) includes pseudo-ruminant fermentation chamber before stomach characteristics: slower digestion than monogastrics carbohydrates are fermented to volatile fatty acids (vfas) acetate, propionate, butyrate. Vfas are absorbed and transported to the liver. Pre-gastric fermentation have rumen before true stomach. Churns and mixes food with gastric juice forming chime. Acid, kills bacteria gastric barrier hydrochloric acid (hcl) secretion (low ph) denatures protein (destroys folding structure) stomach enzymes resist denaturation lipase begins breakdown of triglyceride. Pepsin begins protein breakdown rennin digestion of milk casein (also used in cheese manufacture) rennet commercial form of rennin milk + rennet = curds and whey recombinant rennet (gmo bacteria) used in >80% cheese manufacture.
