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Test your basic knowledge |
Dairy Cattle And Reproduction
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Subjects
:
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. Microscopic - make sure not sterile - very few bulls are actually tested
uterus
semen evaluation (BSE)
cow estrus cycle
ewe estrus cycle
2. (LH) stimulates the Leydig cells to produce testosterone
Lutinizing Hormone in males
reason for seasonal breeding periods
oviducts
Dairy Cattle Lactation (standard)
3. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.
uterus
Dairy Cattle Lactation (standard)
monestrous
sertoli cells
4. 114 days
van deferens
sow gestation
feeding a high producing dairy cow
Holstein Cow
5. Milk ~305 days - dry 60 days prior to calving
Dairy Cattle milking schedule
testis (gonads)
vulva
polyestrous
6. 14-19 (17) days
ewe estrus cycle
Hormones from both the fetus and the mom.
6-8 weeks
mare estrus
7. Start of the reproductive tract for the female. located outside of the body
ewe's estrous cycle
vulva
effects of BST
sow estrus
8. 10-37 (21) days
spermatogenesis
Parturition
libido test (BSE)
mare estrus cycle
9. Days which have decreasing daylight hours
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10. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood
penis proper
rectal palpation (BSE)
feeding a high producing dairy cow
effects of BST
11. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.
effects of estrogen
dairy cattle pregnancy check
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
cervix
12. Look for infection - split - and rupture of the penis
Dairy Cattle Gestation
sigmoid flexure
urethra
penis and prepuce observation (BSE)
13. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %
purpose of Breeding Soundness Exam (BSE) for males
seminiferous tubules
Jersey Cow
epididymis: definition - 3 parts - 4 functions
14. Look for infection - split - and rupture of the penis
mare gestation
penis and prepuce observation (BSE)
Bull's fibro-elastic penis
monorchid
15. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.
ewe gestation
penis sizes vs delivering methods
ewe's estrous cycle
reason for seasonal breeding periods
16. 265-285 days
growth lost from castration methods (knife & band)
Dairy Cattle Gestation
ewe estrus
accessory sex glands
17. 16-20 hours
Blood
hypothalamus and pituitary gland
spermatogenesis
cow estrus
18. Milk ~305 days - dry 60 days prior to calving
growth lost from castration methods (knife & band)
Hard
Dairy Cattle milking schedule
scrotum
19. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders
Mares
Dairy Cattle milking schedule
~1 month
scrotum
20. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.
Culls bulls earlier (2 reasons)
ewe estrus cycle
cow gestation
estrus
21. Can survive ~7 days in cow. vast majority <48 hours
visual evaluation (BSE)
Dairy Cattle milking schedule
Sperm survival specs
dry matter and water
22. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.
sperm cell
pelvis
Holstein Cow
oviducts
23. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase
semen evaluation (BSE)
Holstein Cow
Sperm growth rate
age and castration
24. What about the sperm for a bull which has been castrated but still has testicles?
Lutinizing Hormone in males
effects of BST
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
#1 cost in production
25. Prevent the cow from getting an infection from the calve
Dairy calves are removed from cow at birth to...
estrus
mare ovulation
butterfat
26. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.
van deferens
Lutinizing Hormone in females
things to check for in a breeding soundness exam (BSE)
mare estrus cycle
27. Animal which has been castrated after puberty
Bull's fibro-elastic penis
stag
pelvis
Lutinizing Hormone in males
28. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood
sertoli cells
penis proper
ewe estrus cycle
dairy cattle pregnancy check
29. 2 month growth cycle. stored in the epididymis of the bull
Avg. bull specs
Sperm growth rate
sperm cell
cryptorchid
30. Luteolysis happens because of the ____________ hormone
effects of BST
Blood
prostaglandin
functions of progestrone
31. FEED
functions of progestrone
#1 cost in production
dry matter and water
growth lost from castration methods (knife & band)
32. 265-285 days
things to check for in a breeding soundness exam (BSE)
accessory sex glands
Culls bulls earlier (2 reasons)
Dairy Cattle Gestation
33. % of fat in milk. makes cheeses and ice cream. regulates cost of milk
scrotal circumference (BSE)
epididymis: definition - 3 parts - 4 functions
butterfat
growth lost from castration methods (knife & band)
34. Superior genes are _______ to multiply
polyestrous
prostate gland
mare's estrous cycle
Hard
35. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total
testis (gonads)
Brown Swiss Cow
seminiferous tubules
4 major reasons for culling dairy cows
36. Sperm is produced here
oviducts
ewe estrus cycle
eminal vesicles
seminiferous tubules
37. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg
sperm cell
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
cryptorchid
visual evaluation (BSE)
38. (FSH) causes egg to mature in females
Follical Stimulating in females
4 major reasons for culling dairy cows
sow estrus cycle
polyestrous
39. Failure to have both testis (gonads) descend
Mares
cryptorchid
mare gestation
hormones
40. Duct through penis that carries sperm and urine
urethra
feeding a high producing dairy cow
Sperm survival specs
Dairy Cattle Gestation
41. 4-6 days
penis and prepuce observation (BSE)
Follical Stimulating in females
mare estrus
6-8 weeks
42. 283 days
mare estrus
polyestrous
van deferens
cow gestation
43. Depository for semen during insemination. where urine leaves the body
functions of progestrone
Follical Stimulating in males
sow estrus
vagina
44. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)
Brown Swiss Cow
accessory sex glands
Parturition
Follical Stimulating in males
45. Why does estrus happen before ovulation?
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
feeding a high producing dairy cow
testis (gonads)
humans: stress level vs sperm
46. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers
mare estrus cycle
dairy cattle pregnancy check
Where livelihood is in agriculture
libido test (BSE)
47. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market
dry matter and water
ewe's estrous cycle
testis (gonads)
reasons for castration
48. Failure to have one testis (gonad) to descend
monorchid
cremaster muscle
growth lost from castration methods (knife & band)
testosterone
49. 1-3 days
estrus
cow ovulation
mastitis
sow estrus
50. Provide nourishment for the developing sperm
mare's estrous cycle
sertoli cells
sow ovulation
sow estrus
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