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AVS 305 Review
Terms in this set (20)
What are some good sources of TG (fats?)
-cereal grains (i.e. corn grain)
-oilseeds (i.e. canola)
What are some good sources of galactolipids?
What does biohydrogenation do?
changes unsaturated FA into saturated
Why is biohydrogenation important?
because unsaturated lipids are more toxic to microbes
What molecules are transported across the brush border of enterocytes?
-Fat Soluble Vitamins
What carries the molecules in enterocytes through the system?
chylomicrons act as carriers and enter the lymphatic system through the lacteals to be transported across the system
Once entering the blood from the lymphatic system, where do the FA's go?
Where do chylomicrons go after use?
They get broken down in the liver
What does the liver do with the fragments from used chylomicrons?
It creates VLDL's that transport more FA's to the heart, muscle, and mammaries.
What are VLDL's made of?
What breaks down the chylomicrons and VLDL's?
What is defaunation?
removal of protozoa from the rumen
True or False: Where defaunation occurs, ammonia is higher.
False - when there is no predation on microbes, more microbes are able to utilize ammonia, so ammonia levels would be lower
What are limitations of crude protein analysis?
-assumes all N comes from protein
-assumes all protein has 16% N
What are some limitations of crude fiber analysis?
-assumes all of CF is digestible (lignin is not)
How do you get ash in proximate analysis?
What are limitations of ash analysis?
-underestimate mineral content (destroys Se, I, Cl)
What are some limitations of Crude Fat/Ether Extract analysis?
-overestimate lipid content (includes things that don't provide energy like waxes, fat sol vitamins, pigments)
How do conduct moisture/dry matter analysis?
put food in an oven
What are some limits of dry matter analysis?
-underestimates DM because of loss of volatiles (i.e. silage - fermenation --> VFA's)
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