Exam 3 - ANSC 231 UF

T/F: Consumption of chlorine can cause hypertension.

False

The production stage in dairy cattle where BCS is managed by feeding mid to low quality forages and providing around 25 lbs of DMI per day is the __________________.

far off dry cow period

T/F: In ruminants TDN tends to overestimate energy for forage and underestimate energy for grains.

True

A starter diet for turkeys should contain _________ 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 = .82 x DE

T/F: free choice access to feeds may require more supervision from the producer.

True

T/F: 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

T/F: Beef cows during their third winter should be fed to lose no more than 5-10% of their fall body weight

True

T/F: TDN considers losses from heat and urine.

false

T/F: Molasses can be included in the diet at no more than 2% of the diet.

True

T/F: the only mineral with a legal feeding limit is selenium.

true

Line A is...

Gross energy

Line B is...

fecal energy

Line C is...

digestible energy

Line D is...

urine and gas energy

Line E is...

metabolizable energy

Line F is...

heat increment, heat energy

Line G is...

net energy

T/F: Pyridoxine can be found in high quantities in the muscle

True

T/F: In the growing feedlot phase, the target ADG is 1-1.75 lbs.

False

T/F: A lactating cow's diet would include low quality forages.

False

T/F: Net energy from a protein is higher than fat due to the energy required to dispose of the by-products from N metabolism.

False

T/F: A dairy heifer reared as a replacement should gain approx. 3-4 lbs per day from birth to freshening.

False

T/F: Parakeratosis can develop with a deficiency of Zinc.

true

Exposure to cassava, brassicas, DDT, and tetracyclines could possibly lead to what condition?

goiter

T/F: Liquid feeding has some benefits for young weanling pigs as they tend to eat wet feed more readily.

true

A deficiency in Vit A can lead to loss of night vision because it plays a role in formation of which protein?

rhodopsin

The SCR heatime Pro Collars measure...

activity and rumination

T/F: High dietary fat increases requirement of choline.

true

______________ mineral is fed in reduced amounts in laying hens to decrease wet droppings.

salt

T/F: Turkeys are commonly fed in split-sex groups to achieve the correct diet composition.

true

T/F: In the finishing feedlot phase, the target ADG is 3-3.5 lbs.

True

T/F: Neonatal pigs are susceptible to iron deficiency due to poor maternal transfer of iron.

True

_____________ is the most widely used plant protein in poultry feeds.

soybean meal

T/F: To induce molt, laying hens are fed higher protein, energy, and fiber.

False

When flushing gilts, feed should be increased...

up to 14 days prior to breeding

T/F: High levels of Mg will interfere with K.

False

T/F: Temperatures above the TNZ will increase feed intake.

False

Which of the following apply to stocker cattle?

a. fed to gain 1-1.25 lb/d

b. long period (250-350d)

c. often thin or carry little finish

d. weaned calves bought in fall and over wintered on high roughage

e. all of the above

all of the above

T/F: TDN undervalues protein because it doesn't 100% combust in the body.

True

All of the following are alters than can be provided by the SCR collars, EXCEPT:

internal temperature

T/F: Temperatures outside the TNZ will decrease energy requirements of an animal.

False

T/F: 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

T/F: scurvy is a disease that develops from a vitamin C toxicity.

False

T/F: folic acid is required during early gestation for normal neural tube development.

True

T/F: Indirect calorimetry uses a measurement of gases produced and converts it to a mathematical energy value.

True

T/F: a megacalorie is the equivalent of 1000 calories.

false

T/F: steely wool can develop in sheep due to a selenium deficiency

false

T/F: calcium deficiency can be commonly observed in early lactation of cattle.

true

T/F: Vit A is transported in the blood bound to RBP.

True

T/F: Manganese toxicity can lead to slipped tendon.

false

T/F: A deficiency of potassium can lead to an abnormal electrocardiogram.

True

Nutritional muscular dystrophy is caused by a deficiency of what?

Selenium (Vit E)

Grass tetany is commonly seen in cattle grazing lush pasture in the spring. What mineral deficiency will cause grass tetany?

Magnesium

Which mineral is a structural component of vitamin B 12?

cobalt

This mineral when fed at alternation concentrations (at requirements and deficient) can cause striations in wool or hair color due to depigmentation during a deficiency?

copper

Copper is an antagonist for this mineral

Zinc

T/F: It is likely for animals to develop a toxicity to K, Na, and Cl.

False

Polioencephalomalacia can occur in ruminants with a toxicity of this mineral.

sulfur

salt is a common source of what mineral?

sodium

Ricketts can be caused by a deficiency of phosphorus and what other mineral?

calcium

A deficiency of this mineral can cause pica.

phosphorus

T/F: feeding crystalline amino acids can lead to high Cl in the diet due to combining cl to the amino acids complex.

true

T/F: a deficiency in sodium can reduce growth and feed efficiency.

true

What is the ideal ratio of calcium to phosphorus?

1:2

Blank A is...

25-hydroxylase

Blank B is...

25 hydroxycholecalciferol

Blank C is...

Kidney

Blank D is...

1-alpha-hydroxylase

Blank E is...

1,25 Di-hydroxycholecalciferol or calcitriol

Blank F is...

1,25 Di-hydroxycholecalciferol

Blank G is...

Intestines

Blank H is...

Ca and HPO4

Blank I is...

calcification

Blank J is...

parathyroid hormone (PTH)

T/F: Vit B12 was first associated in history as an extrinsic factor.

true

Version of Vit A with 100% bioactivity

retinol

deficiency of vitamin E

exudative diasthesis

deficiency causes rickets

vitamin D

Vit K is responsible for synthesis of this blood clotting factor.

prothrombin

Hormone form of Vitamin D

calcitriol

Bacterial synthesized form of vitamin K

Menaquinone

What is the most active form of Vit E?

alpha-tocopherol

Form of Vit K found in green plants

Phylloquinone

T/F: black tongue in dogs can be caused by a deficiency in niacin.

true

T/F: There are 9 nutritionally important water soluble vitamins for livestock.

true

How much CP should a laying hen diet have?

14-16%

What percentage CP should leghorn-type (layer) be fed in the starter/pre-starter phase?

18%

What percentage CP should starter and pre-starter broilers (first 2-3 weeks) be fed?

23%

What is cage fatigue in chickens?

Ca deficiency

treat by increasing Ca, P, and Vit D

What feed additive produces the deep yellow color in egg yolks?

Xanthophylls

What feed additive prevents rancidity?

Antioxidants

T/F: CP percentage in a turkey's diet increases as they age.

false

An ideal poultry diet can be achieved balancing a poultry diet for the __________ limiting AA using corn and SBM and adding the __________ and ____________ AAs in synthetic form.

third, first, second

What are some advantages of pelleted feed?

reduced waste, less storage space needed, higher feed efficiency