ASCI 001 Lecture Notes - Lecture 11: Rumen, Blood Sugar, Adipose Tissue
Document Summary
Glucose 6 carbon sugar (a monosaccharide) Deficiency: no specific requirement, but will be manifested as an energy deficiency. Blood glucose is key measure of energy status. A major source of fuel (atp) for metabolism. Only source of fuel for the brain. Large increase in glucose requirements in late pregnancy and lactation. 3 main dietary monosaccharides: galactose part of lactose. Animals lack cellulase enzyme required to breakdown beta(1-4) linkage major components of plant stems and cell walls. Cellulose plant cell wall gives it rigidity rigid because stiff, elongated fibrils. But, can be hydrolyzed by microorganisms in rumen, cecum, and colon. Microbial fermentation to sugars then to vfas in rumen or hindgut. Gluconeogenesis: metabolic generation of glucose from certain non-carbohydrate carbon substrates. 9 kcal/gram made up of fatty acids chains of carbons long (14-20 cs) (generally for dietary) med (6-12 cs) short (<6) C18:3 = 18 carbon chain with 3 double bonds.
