BIOL 1050 Lecture Notes - Lecture 13: Short-Chain Fatty Acid, Rumen, Omasum

• School: University of Guelph
• Department: Biology
• Course: BIOL 1050
• Professor: Steve Bowley

Document Summary

Module 2 nutrie(cid:374)t a(cid:374)d e(cid:374)ergy flow i(cid:374) See p. 944 examples across all species. Herbivores: dental adaptations see p. 953. Biting and chewing: harvesting food, grinding and mechanical breakdown. Salivation: add water to food, add enzymes. Swallowing: move bolus of food to stomach. Stomach: gastric juice hydrochloric acid + pepsin. Hcl reduces ph and mechanical protein breakdown. Pepsin proteins broken down into polypeptides. Secrete pepsinogen and hcl breaks it down to pepsin. Variants: birds crop replaces teeth w/grinding function, ruminants 3 compartments ahead of stomach, hindgut fermenters larger cecum and large intestine. Note: (cid:272)ha(cid:374)gi(cid:374)g a (cid:396)u(cid:373)i(cid:374)a(cid:374)t"s diet (cid:395)ui(cid:272)kly is (cid:271)ad (cid:271)(cid:272) the (cid:373)i(cid:272)(cid:396)o(cid:271)es in the rumen need to adapt to the different kind of feed. Cecum enlarged: symbiotic bacterial digestion similar to ruminant. Varying large intestine function: donkeys very efficient, horses less so, rabbits re-i(cid:374)gest (cid:862)(cid:449)et(cid:863) fe(cid:272)es. Stomach and small intestine breakdown feces further.