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Physiology (Gastrointestinal) > Fermentative Digestion > Flashcards

Flashcards in Fermentative Digestion Deck (8):

What are the hydrolytic digestion endpoints for carbohydrates, proteins, and lipids?

carbohydrates - monosaccharides
proteins - peptides or amino acids
lipids - monoglycerides, fatty acids, glycerol


What are the fermentative digestion endpoints for carbohydrates, proteins, lipids, and microbial cells

carbohydrates - FA, CO2, CH4
proteins - ammonia, keto acids
lipids - fatty acids, propionate
microbial cells - anaerobes


Name the 4 prerequisites for fermentative digestion

oxygen content
removal mechanism


Name the hindgut fermentor for the following: horse, pig, dog, rabbit, rat

horse - sacculated colon
pig - sacculated colon
dog - unsacculated colon
rabbit - cecum
rat - cecum


Name some characteristics of indigenous intestinal microorganisms

grow anaerobically
always found in adult animal
colonize specific areas of the GI tract
maintain stable populations
contribute to nutrient economy of host


Name some characteristics of non-indigenous intestinal microorganisms

not characteristic of habitat
occupy niche in a habitat vacated by indigenous microbes
may cause disease in new host


What determines the microbial population of the GI tract?

substrate (carbohydrate vs. nitrogen)
environment (pH and retention time)


Bacterial ecology in the rumen

30% free in liquid phase of digesta
65% attache to food particles
3% attached to ruminal epithelium
2% attached to protozoa