Lecture 9

Question 1

Where does absorption of LCFAs occur?

Answer 1

Entirely in the SI and dependent upon emulsification aided by bile salts

Question 2

What does increase lipid in diet do to feed intake?

Answer 2

Decreases feed intake

Question 3

Name the 4 phases of rumen development and age that this occurs

Answer 3

1. The newborn phase (0-24hrs)
2. Pre-ruminant phase (1day - 3weeks)
3. Transitional Phase (3weeks - 8weeks)
4. Weaning and postweaning Phases (8weeks - adulthood)

Question 4

Explain the development of the rumen in a newborn

Answer 4

Reticulorumen poorly developed

• papillae absent
• Normal microbial pop absent

Abomasum largest stomach

• No secrtion of acid or pepsinogen

Question 5

What does the absence of acid or pepsinogen in the abomasum allow for the newborn ruminant?

Answer 5

Allows for immune globulins of colostrum to pass without being digested

Question 6

What is colostrum very high in?

Answer 6

IgM

IgG

Question 7

What prevents prenatal transmisison of imune globulins in ruminants?

Answer 7

Syndesmochorial placenta

Question 8

What is anti-trypsin?

Answer 8

Present in colostrum which prevents degradation by trypsin in intestines

Question 9

How are antibodies absorbed by newborns?

Answer 9

Absorbed intact through the intestinal mucosa by pinocytosis

Question 10

5 things colostrum has other than very high IGs?

Answer 10

Rich source of vitamin A,D and E

Lactose converted to glucose and galactose in intestines and absorbed for energy

Ca and Mg

High in fat

Lactobacilli from mammary gland help colonize gut

Question 11

Total serum protein guide for colostrum

Answer 11

< 4.5 = No colostrum

4. 5 - 4.9 = Inadequate
5. 0 - 5.2 = Poor
6. 3 - 5.4 = Borderline
7. 5 - 7.0 = Acceptable

> 7.0 = dehydration likely

Question 12

What is prevented by providing adequate colostrum for passive transfer?

Answer 12

Navel Infection

Joint infection

Scours