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Test your basic knowledge |
Dairy Cattle And Reproduction
Start Test
Study First
Subjects
:
industries
,
dairy
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
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. Can survive ~7 days in cow. vast majority <48 hours
mare ovulation
Sperm survival specs
mastitis
sperm cell
2. Can survive ~7 days in cow. vast majority <48 hours
Hard
Sperm survival specs
sigmoid flexure
estrous
3. Failure to have both testis (gonads) descend
testosterone
rectal palpation (BSE)
cryptorchid
reason for seasonal breeding periods
4. Provide nourishment for the developing sperm
sertoli cells
mastitis
prostaglandin
growth lost from castration methods (knife & band)
5. 19-23 (21) days
sow estrus cycle
dry matter and water
reasons for castration
Culls bulls earlier (2 reasons)
6. Milk ~305 days - dry 60 days prior to calving
Dairy Cattle milking schedule
Hard
what has to happen for males for copulation to occur
effects of estrogen
7. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.
humans: stress level vs sperm
van deferens
Blood
penis proper
8. Allows extension of penis without fibro-elastic penis
Follical Stimulating in females
Grading choice
burdizzo
sigmoid flexure
9. Birthing process (termination of gestation)
Parturition
feeding a high producing dairy cow
sigmoid flexure
things to check for in a breeding soundness exam (BSE)
10. When are steers and heifers weaned from bottle feeding?
Reasons for gestation length being affected
6-8 weeks
cervix
elastrator
11. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has
uterus
rectal palpation (BSE)
sperm cell
Follical Stimulating in females
12. Luteolysis happens because of the ____________ hormone
scrotal circumference (BSE)
prostaglandin
urethra
behavioral signs of estrus
13. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.
Reasons for gestation length being affected
purpose of Breeding Soundness Exam (BSE) for males
scrotum
1. more cost effective - 2. powdered milk is in excess production
14. (LH) stimulates the Leydig cells to produce testosterone
penis sizes vs delivering methods
ewe estrus
Lutinizing Hormone in males
4 major reasons for culling dairy cows
15. ~60 days before calving
testosterone
dry-off time in dairy cattle
behavioral signs of estrus
dartos muscle
16. Implies the amount of estrogen production
Jersey Cow
femininity of a heifer
monorchid
prostate gland
17. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.
Jersey Cow
Bull's fibro-elastic penis
Hard
pelvis
18. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.
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19. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells
cervix
organs used in spermatogenesis
Mares
prostaglandin
20. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers
sow ovulation
Where livelihood is in agriculture
van deferens
ewe estrus
21. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase
age and castration
Bull's fibro-elastic penis
hormones
mare estrus
22. Actual heat cycle (period)
why does the cow need fat deposits during pregnancy?
estrus
dairy cattle pregnancy check
Blood
23. 16-20 hours
cow ovulation
cryptorchid
cow estrus
4 major reasons for culling dairy cows
24. Microscopic - make sure not sterile - very few bulls are actually tested
sertoli cells
mare ovulation
semen evaluation (BSE)
urethra
25. Actual heat cycle (period)
ewe estrus
1. more cost effective - 2. powdered milk is in excess production
estrus
monestrous
26. Milk ~305 days - dry 60 days prior to calving
kidney stones also called ________ ___________ can develop in the sigmoid flexure
polyestrous
oviducts
Dairy Cattle milking schedule
27. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.
spermatogenesis
van deferens
what has to happen for males for copulation to occur
castration
28. 1-3 days
semen evaluation (BSE)
sow estrus
cryptorchid
sertoli cells
29. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.
pelvis
ewe ovulation
penis and prepuce observation (BSE)
castration
30. Animals which have many estrous periods per year (ex: cow - sow)
hormones
purpose of Breeding Soundness Exam (BSE) for males
penis and prepuce observation (BSE)
polyestrous
31. 30-38 hours after estrus cycle begins
accessory sex glands
sow ovulation
cow estrus
organs used in spermatogenesis
32. 114 days
dartos muscle
Holstein Cow
sow gestation
Dairy Cattle Gestation
33. 1. brain function - 2. blood flow - 3. willing female
what has to happen for males for copulation to occur
stag
behavioral signs of estrus
ewe's estrous cycle
34. 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 milking schedule
ewe estrus cycle
mare gestation
35. ~60 days before calving
seminiferous tubules
dairy cattle pregnancy check
estrus
dry-off time in dairy cattle
36. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed
Avg. bull specs
castration
testosterone
testis (gonads)
37. % of fat in milk. makes cheeses and ice cream. regulates cost of milk
Lutinizing Hormone in males
butterfat
things to check for in a breeding soundness exam (BSE)
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
38. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.
Reasons for gestation length being affected
Where livelihood is in agriculture
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
leydid or interstitial cells
39. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market
burdizzo
scrotum
reasons for castration
mare estrus cycle
40. Days which have increasing daylight hours
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41. 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.
sigmoid flexure
mare estrus
epididymis: definition - 3 parts - 4 functions
Culls bulls earlier (2 reasons)
42. Produce testosterone. located between the seminiferous tubules
Lutinizing Hormone in females
leydid or interstitial cells
reason for seasonal breeding periods
estrous
43. To remove/separate testicles from animal's body before animal reaches puberty
castration
cow gestation
purpose of Breeding Soundness Exam (BSE) for males
Sperm growth rate
44. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.
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45. Days which have decreasing daylight hours
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46. Produce testosterone. located between the seminiferous tubules
leydid or interstitial cells
Dairy Cattle Gestation
Where livelihood is in agriculture
behavioral signs of estrus
47. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total
colostrum
testis (gonads)
humans: stress level vs sperm
Reasons for gestation length being affected
48. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co
reasons for castration
effects of BST
growth lost from castration methods (knife & band)
epididymis: definition - 3 parts - 4 functions
49. Depository for semen during insemination. where urine leaves the body
Hard
vagina
eminal vesicles
Dairy Cattle milking schedule
50. Contains and regulates the temp of the testes for sperm production
femininity of a heifer
sertoli cells
growth lost from castration methods (knife & band)
scrotum
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