Instructor Read each question carefully. What are the six classes of nutrients. Linoleic Acid, Linolenic Acid and Arachidonic Animal body can not synthesize, because they do not have the enzyme to insert double bonds at first w3 and w6 position. These include acetic, propionic acid and butyric acids. Duodenum, Jejunum,Ileum duodenal juice, bile, pancreatic secretions, and succus entericus or secretions from intestinal mucosa.
True digestibility considers endogenous loss in the feces.
Nutrient Intake 8. A growth trial or feeding trial, in general, only measures the weight gain and feed intake of an animal. Digestion trials require the measurement of fecal output as well as feed intake and nutrient analysis of the feed and feces. Thus, more work is involved and more information is available from the digestion trial. With a digestion trial we can more accurately identify if a feed is valuable to an animal or not in terms of meeting its requirements.