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ANS 319 NUTRITION LOWA STATE WITH BAUMGARD EXAM QUESTIONS AND ANSWERS
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ANS 319 NUTRITION LOWA STATE WITH BAUMGARD EXAM QUESTIONS AND ANSWERS...
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ANS 319 NUTRITION LOWA STATE WITHBAUMGARD EXAM QUESTIONS AND
ANSWERS
Ingestion?
Digestion?
Absorption?
Elimination? - ANSWER Ingestion: act of eating
Digestion: the process of breaking down food into molecules small
enough for the body to absorb
Absorption: taking up small molecules from the digestive compartment
Elimination: undigested material passes out of the digestive
compartment
Why do we use everything on a dry matter basis? - ANSWER Cost and
nutritive value
What process can cause cavities, bad breath, flatulence, beer making,
body odour, etcetera? - ANSWER Fermentation
Explain the process of fermentation - ANSWER Microorganisms +
glucose = VFA + CO2
What are the three structural carbohydrates? Which is completely
indigestible to all organisms except fungi? - ANSWER Cellulose,
hemicellulose, and lignin (indigestible)
List three highly digestible components inside a plant cell wall -
ANSWER Protein, sugar, starch, fat
Lignin in latin translates to... - ANSWER Wood
T/F: As plants mature, they gain more valuable digestible proteins,
energy, vitamins, and minerals? - ANSWER F: As plants mature, they
gain more fiber/lignin as they thicken and become less digestible.
, T/F: During a drought, plants will become less digestible as they
increase fiber production to retain water? - ANSWER T
Name the four classes of plant feeds and give an example of each -
ANSWER Forages: grasses, legumes
Grains: seeds of cereals, linseed plants
Roots: turnips, beets
Byproducts: cereal seed coats, oilseed meals
Difference between grasses and legumes - ANSWER Grasses: corn,
timothy, fescue
Legumes: alfalfa, clover, beans, ability to fix atmospheric N2
What is the name of the N2 fixing bacteria that has a symbiotic
relationship with legumes? - ANSWER Rhizobium nodules
T/F: Leaves of a plant are less nutritious, higher in structural carbs, and
have more vascular tissue than the stems. - ANSWER F: Leaves are
more nutritious and lower in structural carbs than stems.
How do you know how much you should pay for your feed? - ANSWER
Nutrient density & digestibility
Difference between in vivo and in vitro - ANSWER In vivo: within an
animals body
In vitro: trying to replicate the conditions of in vivo
T/F: Feces are composed of 75% water? - ANSWER T
How does the time of harvest affect the relationship between yield and
digestibility? - ANSWER Digestibility decreases with increased time
until harvest.
Carbs are essential or nonessential nutrients? - ANSWER
Nonessential
Nutrients provide energy for... - ANSWER Maintenance, new tissue
growth, storage, and protein turnover
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