Exam 3 Flashcards
overconsumption of choline can cause hypertension
false
the production stage in dairy cattle where the BCS is managed by feeding mid to low quality forages and providing about 25 pounds of DMI/day is the
far off dry cow period
in ruminants TDN tends to overestimate energy for forage and underestimate energy for grains
true
a starter diet for turkeys should contain no more than what percent CP
28
we can estimate ME, given DE and an assumption about the combined energy lost from urine and gas. the calculation is?
ME=0.82 X DE
free choice access to feeds may require more supervision from the producer
true
HfE goes down with high fiber feeds
false
HdE describes
heat of digestion and absorption
HfE describes
heat of fermentation
HwE describes
heat of waste product formation and excretion
HrE describes
heat of product formation
beef cows during their 3rd winter should be fed to lose no more than 5-10%of their fall body weight
true
TDN considers losses from heat and urine
false
molasses can be included in the diet at no more than 2% of diet
true
the only mineral with a legal feeding limit is selenium
true
net energy system
A: gross energy
B: fecal energy
C: digestible energy
D: urine and gas energy
E: metabolizable energy
F: Heat increment
G: net energy
pyridoxine can be found in high quantities in muscle
true
in the growing feedlot phase, the target ADG is 1-1.75 lbs
false
a lactating cows diet would include low quality forages
false
net energy from a protein is higher than fat due to the energy required to dispose of the by-products from N metabolism
false
a dairy heifer reared as a replacement should gain approximately 3-4 lbs per day from birth to freshening
false
parakeratosis can develop with a deficiency of zinc
true
exposure to cassava, brassicas, DDT, and tetracyclines could possibly lead to what condition
goiter
liquid feeding has some benefits for young weanling pigs as they tend to eat we feed more
true
the SCR Pro collars measure
activity
rumination
high dietary fat increases requirement of choline
true
what mineral is fed in reduced amounts in laying hens to decrease wet droppings
salt
turkeys are commonly fed in split-sex groups to achieve the correct diet composition
true
in the finishing feedlot phase, the target ADG is 3-3.5 lbs
true
neonatal pigs are susceptible to iron deficiency due to poor maternal transfer of iron
true
soybean meal is the most widely used plant protein in poultry feeds
true
to induce molt, laying hens are fed higher protein, energy, and fiber
false
when flushing gilt, feed should be increased…
up to 14 days before breeding
high levels of Mg will interfere with K
false
temperatures above the thermoneutral zone will increase feed intake
false
which of the following apply to stocker cattle
- fed to gain 1-1.25lb/d
- long period (250-350d)
- often thin or carry little finish
- weaned calves bought in fall and over wintered on high roughage
TDN undervalues protein because it doesn’t 100% combust in the body
true
all of the following are alerts that can be provided by the SCR collars except
internal temp
temperatures outside the thermoneutral zone will decrease energy requirements of an animal
false
DDGs can often lead to consumption of high levels of sulfur
true
a calorimeter gives a value of energy by measuring what
heat released from combustion
scurvy is a disease that develops from a vitamin c toxicity
false
folic acid is required during early digestion for normal neural tube development
true
indirect calorimetry uses a measurement of gases produced and converts it to a mathematical energy value
true
a megacalorie is the equivalent of 1000 calories
false
steely wool can develop in sheep due to a selenium deficiency
false
calcium deficiency can be commonly observed in early lactation of dairy cattle
True
vitamin A is transported in the blood bound to RBP
true
manganese toxicity can lead to a slipped tendon
false
vitamin D metabolism
A: 25 hydroxylase
B: 25 hydroxycholecalciferol
C: kidney
D: 1 alpha-hydroxylase
E: 1,25 Di-Hydroxycholecalciferol
F: 1,25 Di-Hydroxycholecalciferol
G: intestines
H: Ca and HPO4
I: calcification
J: parathyroid hormone
Grass tetany is commonly seen in cattle grazing lush pasture in the spring. What mineral deficiency will cause grass tetany?
magnesium
Polioenchephalomalacia can occur in ruminants with a toxicity of this mineral.
sulfur
Nutritional muscular dystrophy is caused by a deficiency of what?
selenium
This mineral when fed at alternating concentrations (at requirements and deficient) can cause striations in wool or hair color due to depigmentation during a deficiency .
copper
Which mineral is a structural component of vitamin B12?
cobalt
Rickets can be caused by a deficiency of phosphorus and what other mineral?
calcium
Salt is a common source of what mineral?
sodium
A deficiency in this mineral can cause pica.
phosphorus
Copper is an antagonist for this mineral.
zinc
The trace mineral most commonly associated with the thyroid hormone thyroxin is ?
iodine
pica can be a sign of phosphorus deficiency
true
menaquinone
Bacterial synthesized form of vitamin K
calcitriol
Hormone form of Vitamin D
deficiency of vitamin E
exudative diatheses
Vitamin K is responsible for synthesis of this book clotting factor
prothrombin
phylloquinone
form of vitamin K found in green plants
most active form of vitamin E
alpha-tocopherol
deficiency causes rickets
vitamin D
retinol
Version of vitamin A with 100% bioactivity
which of the following is consistent with an additive during finishing phase
MGA
Monensin
