Flashcards in Ruminant Digestion Deck (11):
How is ruminant saliva different than non-ruminant saliva?
Ruminants produce much more saliva with a higher pH and higher concentration of bicarbonate, and also contains urea
How is energy obtained for microbe growth?
Partial oxidation of carbohydreates
How are do VFAs get into the bloodstream?
Move out of rumen directly into bloodstream
What are volatile fatty acids? Then name three.
Short chain fatty acids with 2-4 carbons. Acetic acid, proprionic acid, and butyric acid
What occurs in the first stage of rumen metabolism?
Hydrolysis of feedstuff, digestion of polysaccharides, production of enzymes (Cellulase, alpha-amylase, pectinase, hemicellulase, sucrase)
What occurs in the second stage of rumen metabolism?
Products of hydrolysis are used for intracellular glycolysis, pyruvate is converted to lactic acid and NADH reduces substrates to VFAs
What occurs in the third stage of rumen metabolism?
VFA and methane formation from pyruvate
What does formate from pyruvate form?
What does pyruvate turn into to form acetic acid?
What does pyruvate turn into to form butyric acid?