Upgrade to remove ads
Only $35.99/year

repro review

Terms in this set (57)

Which of the following choices is an inhibitor of the resumption of meiosis?
cAMP
Administration of exogenous progesterone for 7-10 days and then withdrawing it mimics which of the following events?
luteolysis
The effect of increasing daylight is to increase melatonin secretion by the pineal gland.
false
The sudden introduction of a ram to a ewe flock after they have been isolated from a male for 6 weeks, causes:
LH surge within 6 days
During estrus in the bitch, most cells in a vaginal swab are of what type?
superficial cells
When would be the best time to breed a bitch? when progesterone levels are
4-10 ng/ml
During the maturation phase of spermatogenesis, mitochondria migrate to the:
midpiece
Which of the following choices converts testosterone to estradiol and produces inhibin?
sertoli cells
Removal of the ovaries would result in increased
FSH
Waves of follicles are stimulated to start development by:
FSH
T/F A gilt is a young male pig.
false
As the follicles move from the recruited pool to the selected pool, which of the following would be expected to increase?
estrogen
With the progesterone block on GnRH relieved by luteolysis, which of the following results in the LH surge?
•A. positive feedback of estrogen on GnRH & resultant LH surge
•B. interaction of ovarian oxytocin and PGF2α
•C. decreased negative feedback action of inhibin on the hypothalamus
positive feedback of estrogen on GnRH & resultant LH surge
Which of the following muscles cause compression of penile veins during erection?
ischiocavernosus M
Anti-Mullerian hormone is produced by the developing
testis
Bromocriptine can be used to shorten the length of anestrus in the bitch because it is a _________ agonist and will inhibit ______________ release
dopamine agonist and will inhibit prolactin release
Which of the following choices is a glycoprotein produced by the granulosa cells of a follicle and affects FSH secretion?
inhibin
Which of the following has an estrus lasting 2-3 days and ovulates about 40 hours after the onset of estrus?
sow
T/F - The cumulus oophorus is the mass of cells surrounding the oocyte.
true
Which of the following hormones is used to treat a cystic ovary in a cow?
GnRH
T/F - housing small groups of 2-3 gilts together hastens the onset of puberty compared to larger groups (>10) housed together.
false
If I wanted to breed one of my does in the spring, which of the following choices would be best to achieve that?
•A. increase lights for ~2m, then decrease exposure
•B. decrease the amount of ambient light for ~2m
•C. place her on progesterone for at least 14 days
increase lights for ~2m, then decrease exposure
Which of the following occurs during the acrosomal phase of spermatogenesis?•A. nucleus begins to elongate
•B. mitochondria assemble in mid piece
•C. centrioles migrate to base of nucleus
•D. tail begins to emerge
nucleus begins to elongate
The dominant follicle produces large amounts of which hormone that in turn produces conditions that inhibit the growth of other follicles?
estrogen
T/F - "Flushing" ewes means uterine lavage post partum
false
T/F - Proacrosin is an enzyme that forms a strong affinity for the zona pellucida
true
T/F - Adipocytes produce leptin which is thought to have a direct effect on stimulating GnRH neurons
true
Maternal recognition of pregnancy (MRP) involves inhibiting production of &/or release of PGF2α in ruminants, swine and horses. Which of the following is involved in MRP in cattle?
interfeuron tau
T/F - Related to the previous question, the presence of conceptuses redirect PGF2α to the uterine lumen in a pregnant sow.
true
T/F - Maternal recognition of pregnancy in dogs involves secretion of specific pregnancy recognition factors by the conceptus
false
T/F - In the later pregnant cow, fetal cortisol stimulates an increase in PGF2α & subsequent luteolysis.
true
T/F - Capacitation of sperm begins in the isthmus of the uterine tube (oviduct)
false
Once a sperm cell penetrates the zona pellucida and vitelline space & fuses with the oocyte plasma membrane, which of the following events occurs?
cortical reaction
T/F - α-fetoprotein binds estradiol and prevents it from crossing the blood-brain barrier
true
A dog owner wants to avoid spaying his dog but doesn't want her in heat for an extended period. Which of the following choices is a long-lasting progesterone analogue that should only be used in anestrus?
MPA (depo-provera)
T/F - A heifer must reach a threshold body size before she can undergo puberty
true
Which of the zona pellucida glycoproteins binds sperm?
ZP3
T/F - Estrogen is responsible for most alveoli development in the mammary gland
false
T/F - Galactopoesis is the synthesis and secretion of milk
false
T/F - An intact adult male goat is called a billy or a buck.
true
T/F - Cervical mucus secretion in the form of sulfomucin impedes passage of sperm into the uterus.
true
Which of the following choices is the definition of lochia? __________, ____________________ vaginal discharge
normal, post-partum
T/F - The best way to synchronize estrus in a group of lactating sows is treatment of all sows with PGF2α
false
Why wouldn't a dominant follicle ovulate during the first or second follicle wave?_______________ inhibition of GnRH & LH surge
progesterone
Which of the following choices is involved with the block to polyspermy?
cortical granules
Maintenance of the corpus luteum in the bitch is by the actions of LH and which other hormone?
prolactin
Which of the following choices is the definition of puberty by age in the male?
•A. when behavioral traits are expressed
•B. first ejaculation
•C. appearance of sperm in the ejaculate
•D. threshold number of spermatozoa
all of the above
If you wanted to have a mare ovulating by February 1, when should light therapy begin? ________ days prior
60 days prior
T/F - Maturation of the hypothalamus and GnRH neurons increases the negative feedback of estrogen or testosterone.
false
T/F - The presence of a male enhances the onset of puberty in the sow.
true
Based on the number of tissue layers between maternal and fetal blood, which of the following is the classification of a dog or cat placenta?
endotheliochordial
What is the direct mechanism of action for the answer to seasonality in the mare? ___________ melatonin -> ___________ GnRH
decreased melatonin -> Increased GnRH
Which of the following choices is suggested to get a mare through the vernal transition and start having regular estrous cycles? _____________ on progesterone with __________ on Day 9
10 days progesterone with PGF2alpha on day 9
T/F - A ewe lamb born in the spring would be expected to go through puberty in one year.
false
Onset of the breeding season in ewes can be hastened by which of the following?
the ram effect
Which of the following choices is the normal length of time for mare estrus?
5 days
...
...
Other sets by this creator