Pig Part II (Exam II) Flashcards
What hormone directly causes an increase in milk synthesis?
Prolactin
Which of the following hormones, released by the ovary, inhibits hormonal release from the hypothalamus?
Progesterone
The functional units of mammary tissue are?
Alveoli
The presence of a fetus inhibits this hormone from being released by the uterus to destroy the corpus luteum?
PGF2a
The nervous system originates from the?
Ectoderm
Which hormone by the pituitary targets the thyroid gland to produce T3 and T4?
TSH
What does insulin do in the body?
Lower blood glucose levels
A cow providing milk to her calf is an example of which behavioral system?
Care-giving
A calf bellowing out to her mother for milk is an example of which behavioral system?
Care-soliciting
Courtship and the flehmen response are both examples of which system of behavior?
Sexual
The (blank) is the term for the embryo that implants into the uterus which then develops tissues and organs and is called a(blank)?
Blastocyst,,,Fetus
Which hormone is released prior to parturition in the dam due to elevated cortisol levels from the fetus?
Relaxin
What is the correct order of anatomical structures(internal to external)?
Testis, epididymis, vas deferens, urethra, penis
Where is the site of natural copulation in all female livestock except for the sow?
Vagina
The digestive system originates from the?
Endoderm
What type of tissue is found in the alveoli?
Epithelial
What holds the mammary glands in place on the body?
Middle and lateral suspensory ligament
What hormone is directly responsible for ovulation?
LH
When you approach a ewe, she will often find an escape path around you and run away to avoid confrontation and contact. Which system of behavior is this an example of?
Agonistic
You drop your cellular phone in the pen with the pigs and they all run over to it and start moving it with their snouts. What type of behavior are they exhibiting?
Investigative
What does LH stimulate in the bull?
Testosterone synthesis
What does FSH stimulate in the boar?
Sperm production
What does glucagon do in the body?
Raise blood glucose levels
Which hormone specifically targets the cortex of the adrenal gland?
ACTH
You open the barn doors in the morning and the sheep nearest to the door gets up and walks out to the pasture to eat. All of the other sheep in the barn follow her. What type of behavior is the flock exhibiting?
Allelomimetic
Walking to class you notice all of the squirrels are gathered under a tree. Your partner exclaims, “It feels like rain!” Suddenly you realize that the squirrels are showing what behavioral type?
Shelter- seeking
Which hormone, produced by the ovary would increase the size of the mammary gland?
Estrogen
Which hormone, produced by the ovary would stimulate alveoli growth?
Progesterone
which of the following is not true about gametogenesis?
Occurs in a steer
Which of the following is not true about spermatogenesis?
Occurs outside the zona pellucida
Which of the following is not true about oogenesis?
Occurs in the seminiferous tubules
function of penis
copulation
function of seminal vesicles
produce the fluid portion of semen
function of testes
produce the male gamete
function of epididymis
transport sperm to the ampulla
function of the tunica dartos
thermoregulation of the gonad
function of the vas deferens
spermatazoa maturation
Length of estrous cycle
Cow = 21 days Sow= 17 days Ewe= 21 days
Length of estrus
Cow= 18 hours Sow= 30 hours Ewe= 60 hours
Length of Gestation
Cow= 18-48 days Sow= 24-27 days Ewe= 38-42 days
connective tissue function
connect muscle to bone and other tissues
nervous tissue functions
transmits information throughout body by stimuli (neurons)
epithelial tissue functions
protection, secretion, excharge
muscle tissue functions
aide in movement
There are high levels of progesterone circulating a sow. What phase of the estrous cycle is she most likely to be in?
Luteal
While counting sheep in your sleep, you notice that they are in heat. What are the dominant structures you would expect to find on the ovaries of those sheep?
follicles
difference between estrus and estrous
estrus: period in which the female is in heat, accepting male
estrous: time from estrus to estrus
Which hormone, produced by the ovary would stimulate alveoli growth?
Progesterone
there are six different types of connective tissue in mammals name three.
fibrous, loose, adipose
What is the predominant hormone being produced by the ovary if the animal is in the follicular phase of the estrous cycle?
Estrogen
What is the stimulus ultimately causes lactation in mammals?
suckling
What is the structure that allows for the exchange of nutrients and waste between a mother and the fetus is called?
Placenta
What is the name for a specific type of hormone that is released outside of the body by a specific gender that targets the other gender for reproductive purposes?
Pheromones
What is the scientific term for a fertilized oocyte?
Zygote
What is the term for the natural end of gestation?
Parturition
Name all 8 breeds of beef
Angus, Hereford, Simmental, Limousin, Brangus, Shorthorn, Brahman, Charolais
Angus
Highest numbers british breed from scotland naturally polled black hair and skin moderate frame size maternal breed good marbling
Hereford
#2 in numbers british breed from england red body w/ white face & underline can be horned or polled range cattle docile longevity
Simmental
continental breed switzerland red&white, yellow, black colored growth traits maternal traits
Limousin
continental breed france polled & horned golden, red, black large framed muscular rate of gain feed efficiency growth traits
Charolais
continental breed frane polled or horned white, straw large frame muscular growth rate feed efficiency
shorthorn
british breed from england polled or horned red, white, roan coloring docile milking ability
Brahman
Zebu US (brazil/india) horned gray & red humped back large, droopy ears loose skin heat tolerant parasite resistant maternal
Brangus
United States 3/8 brahman & 5/8 angus polled black heat tolerant early maturing muscular
Name all the dairy breeds
holstein, jersey, brown swiss, ayrshire, guernsey
Holstein
from netherlands black and white weigh 1500 lbs #1 in US highest milk yield
jersey
from jersey island grey/fawn color weigh 1000 lbs #2 in US highest milk fat
Brown Swiss
From switzerland
solid black/brown
weigh 1400 lbs
#3 in US
Ayrshire
from scotland
mahogany w/ white spots
weigh 1200 lbs
#4 in USA
Guernsey
from guernsey island
light red and white/yellow
weigh 1100 lbs
#5 in US
Describe ewe breeds
white faced reproductive efficiency wool production milking ability longevity
describe ram breeds
black faced
growth rate
carcass characteristics
Rambouillet
ewe breed france 150-200 lbs medium growth rate medium muscling
Corriedale
ewe breed New zealand 130-180 lbs medium growth rate medium muscling
Suffolk
ram breed england 250-350 lbs very high growth rate high muscling
hampshire
ran breed england 225-325 lbs high growth rate high muscling
Dorset
dual-purpose breed england ewes 140-180 lbs rams 210-250 lbs medium growth rate medium muscling
Columbia
dual-purpose breed USA ewes 150-225 lbs rams 225-300 lbs high growth rate medium muscling
Yorkshire pig
maternal breed highest #s large white breed, long body, large frame, erect ears large litters high milk production heavy 21 day litter weight slow growth rate
Landrace pig
from denmark medium sized white breed, large droopy ears, straight snout, long deep body, flat back large litters efficient feed utilization meaty carcass
Duroc
terminal breed from Jersey reds & red berkshires cherry red color, droopy ears, large good carcass type & conformation high muscling & carcass yield fast growth rate lean carcass
hampshire pig
terminal breed black w/ white band around shoulders & front legs erect ears, long face, small breed lean carcass thin backfat thickness
