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Test your basic knowledge |
Dairy Cattle And Reproduction
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Subjects
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industries
,
dairy
Instructions:
Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Help to signal hormone levels which we need both in the brain right next to each other.
hypothalamus and pituitary gland
Dairy calves are removed from cow at birth to...
sow estrus
Dairy Cattle Lactation (standard)
2. 4-6 days
4 major reasons for culling dairy cows
sigmoid flexure
Jersey Cow
mare estrus
3. 16-20 hours
cow estrus
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
ewe ovulation
monorchid
4. ~60 days before calving
reasons for castration
dry-off time in dairy cattle
4 major reasons for culling dairy cows
humans: stress level vs sperm
5. Parturition is controlled by...
ewe estrus
cervix
testis (gonads)
Hormones from both the fetus and the mom.
6. Contains and regulates the temp of the testes for sperm production
butterfat
feeding a high producing dairy cow
scrotum
cowper's gland
7. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg
sperm cell
polyestrous
mare gestation
effects of BST
8. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.
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9. Animals which have many estrous periods per year (ex: cow - sow)
leydid or interstitial cells
polyestrous
4 major reasons for culling dairy cows
mare estrus
10. Important 'landmark' during palpation
Lutinizing Hormone in females
scrotum
cervix
polyestrous
11. Milk is 15% ________ and 85% __________.
Dairy Cattle milking schedule
testis (gonads)
dry matter and water
monorchid
12. Microscopic - make sure not sterile - very few bulls are actually tested
semen evaluation (BSE)
penis sizes vs delivering methods
Reasons for gestation length being affected
feeding a high producing dairy cow
13. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)
4 major reasons for culling dairy cows
colostrum
1. more cost effective - 2. powdered milk is in excess production
accessory sex glands
14. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat
cremaster muscle
stag
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
Holstein Cow
15. 283 days
#1 cost in production
cowper's gland
cow gestation
Lutinizing Hormone in females
16. Why does estrus happen before ovulation?
kidney stones also called ________ ___________ can develop in the sigmoid flexure
normal presentation of the fetus
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
ewe estrus
17. Sperm is produced here
seminiferous tubules
monestrous
butterfat
sperm cell
18. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.
oviducts
castration
things to check for in a breeding soundness exam (BSE)
growth lost from castration methods (knife & band)
19. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)
sow estrus cycle
prostate gland
Sperm survival specs
mare's estrous cycle
20. 147 days
dartos muscle
ewe gestation
normal presentation of the fetus
testis (gonads)
21. Animal which has been castrated after puberty
stag
Dairy calves are removed from cow at birth to...
estrous
Size of cow in relation to the amount of milk produced
22. To remove/separate testicles from animal's body before animal reaches puberty
growth lost from castration methods (knife & band)
Hard
libido test (BSE)
castration
23. (LH) causes female's egg to break (her period)
spermatogenesis
Lutinizing Hormone in females
Size of cow in relation to the amount of milk produced
dartos muscle
24. Start of the reproductive tract for the female. located outside of the body
penis and prepuce observation (BSE)
vulva
sertoli cells
growth lost from castration methods (knife & band)
25. When are dairy cattle dehorned?
mare estrus cycle
Hormones from both the fetus and the mom.
~1 month
dairy cattle pregnancy check
26. Implies the amount of estrogen production
libido test (BSE)
femininity of a heifer
monorchid
Follical Stimulating in females
27. 265-285 days
monorchid
van deferens
Dairy Cattle Gestation
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
28. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)
sertoli cells
sow estrus cycle
feeding a high producing dairy cow
humans: stress level vs sperm
29. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.
colostrum
dairy cattle pregnancy check
ewe's estrous cycle
dairy cattle pregnancy check
30. Duct through penis that carries sperm and urine
urethra
growth lost from castration methods (knife & band)
rectal palpation (BSE)
femininity of a heifer
31. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat
estrous
mare's estrous cycle
penis and prepuce observation (BSE)
functions of progestrone
32. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).
femininity of a heifer
leydid or interstitial cells
hormones
ewe gestation
33. Failure to have one testis (gonad) to descend
hypothalamus and pituitary gland
ewe's estrous cycle
ewe ovulation
monorchid
34. Urinary calculi.
effects of estrogen
retractor muscles
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
kidney stones also called ________ ___________ can develop in the sigmoid flexure
35. Scar tissue plugs up chambers of udder
ewe estrus
accessory sex glands
mare gestation
mastitis
36. 24 hours before end of estrus cycle
Sperm survival specs
mare ovulation
ewe gestation
ewe gestation
37. 1-2 days
ewe estrus
cow ovulation
testis (gonads)
Lutinizing Hormone in females
38. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)
mare estrus
Bull's fibro-elastic penis
prostate gland
kidney stones also called ________ ___________ can develop in the sigmoid flexure
39. (switzerland) 2nd in size and milk production - most muscle -
Brown Swiss Cow
effects of BST
Bull's fibro-elastic penis
Lutinizing Hormone in females
40. When are steers and heifers weaned from bottle feeding?
age and castration
6-8 weeks
testis (gonads)
epididymis: definition - 3 parts - 4 functions
41. Milk ~305 days - dry 60 days prior to calving
sow ovulation
behavioral signs of estrus
Dairy Cattle milking schedule
Brown Swiss Cow
42. Superior genes are _______ to multiply
Mares
Follical Stimulating in females
femininity of a heifer
Hard
43. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood
testis (gonads)
penis proper
ewe gestation
Dairy Cattle Gestation
44. What helps regulate spermatogenesis?
~1 month
cow estrus cycle
Blood
testosterone
45. 19-23 (21) days
mare estrus
elastrator
cow estrus cycle
ewe ovulation
46. Look for infection - split - and rupture of the penis
monestrous
Jersey Cow
accessory sex glands
penis and prepuce observation (BSE)
47. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.
mare gestation
Reasons for gestation length being affected
sperm cell
eminal vesicles
48. Prevent the cow from getting an infection from the calve
oviducts
mare ovulation
Dairy calves are removed from cow at birth to...
sertoli cells
49. Help to signal hormone levels which we need both in the brain right next to each other.
Dairy Cattle milking schedule
hypothalamus and pituitary gland
vulva
colostrum
50. Prevent the cow from getting an infection from the calve
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
Jersey Cow
Lutinizing Hormone in males
Dairy calves are removed from cow at birth to...
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