Ruminant Digestion Flashcards Preview

Anatomy and Physiology > Ruminant Digestion > Flashcards

Flashcards in Ruminant Digestion Deck (11):
1

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

2

How is energy obtained for microbe growth?

Partial oxidation of carbohydreates

3

How are do VFAs get into the bloodstream?

Move out of rumen directly into bloodstream

4

What are volatile fatty acids? Then name three.

Short chain fatty acids with 2-4 carbons. Acetic acid, proprionic acid, and butyric acid

5

What occurs in the first stage of rumen metabolism?

Hydrolysis of feedstuff, digestion of polysaccharides, production of enzymes (Cellulase, alpha-amylase, pectinase, hemicellulase, sucrase)

6

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

7

What occurs in the third stage of rumen metabolism?

VFA and methane formation from pyruvate

8

What does formate from pyruvate form?

Methane

9

What does pyruvate turn into to form acetic acid?

Acetyl phosphate

10

What does pyruvate turn into to form butyric acid?

Acetyl CoA

11

What does pyruvate turn into to form proprionic acid?

Lactate or oxaloacetate