Nutrition and Digestive Physiology. Dr. Mickey A. Latour Purdue University West Lafayette, IN 47907. Livestock Feeding. How is a ration balanced?. Pearson Square. Pearson Square. Soybean Meal = 3 parts Barley = 28 parts Total Parts = 31 Soybean Meal = 3/31 or 10% Barley = 28/31 or 90%
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Dr. Mickey A. Latour
West Lafayette, IN 47907
Food---Mouth-Esophagus-Stomach--Small Intestine---Large Intestine-
A) The food is considered a “bolus” and the act of putting
food in the mouth is called “prehension”.
B) Mouth is where chewing occurs to increase the surface
area of food which aids in the digestion process.
A) Small amounts of pepsinogen are released and the stomach
become acidified through the hormone gastrin.
Three phases of Gastric secretion
Figure 24.13c, d
- Once food enters the small intestine a number of hormones are
a. Secretin----stimulates pancreas to release enzymes
b. Gastric inhibitory peptide
Figure 24.17b, c
Figure 24.17d, e
Figure 24.21a, b
1) Emulsify fat into small particles and targeted for absorption
2) A means for excretion of waste products (i.e., biliruben)
a) Active absorption of electrolytes and water
a) convert large amounts of starch and cellulose to volatile fatty acids
b) convert both protein and nonprotein nitrogen into amino acids
c) synthesize Vitamin K, and all B complexes
Figure 24.19b, c
Figure 24.20a, b