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Dairy Cattle And Reproduction

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. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






2. Milk ~305 days - dry 60 days prior to calving






3. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders






4. 16-20 hours






5. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






6. Look for infection - split - and rupture of the penis






7. Scar tissue plugs up chambers of udder






8. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)






9. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed






10. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).






11. % of fat in milk. makes cheeses and ice cream. regulates cost of milk






12. (LH) stimulates the Leydig cells to produce testosterone






13. Not under a timeline - cow can not be sold as steak






14. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat






15. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers






16. (switzerland) 2nd in size and milk production - most muscle -






17. Castration tool which clamps down on the vans deferens. causes the sperm to not reach the penis to be ejaculated






18. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






19. Why does estrus happen before ovulation?






20. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)






21. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm






22. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood






23. Implies the amount of estrogen production






24. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood






25. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase






26. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






27. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation






28. Urinary calculi.






29. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






30. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






31. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %






32. 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






33. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm






34. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






35. 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






36. Milk is 15% ________ and 85% __________.






37. Urinary calculi.






38. 4-6 days






39. Superior genes are _______ to multiply






40. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






41. Way to know everything is alright with the breeding male






42. ~305 days (altough often longer due to breeding difficulties)






43. Animals which have many estrous periods per year (ex: cow - sow)






44. 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






45. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






46. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)






47. 45-60 days after breeding; re-breed as required






48. When are dairy cattle dehorned?






49. Parturition is controlled by...






50. Microscopic - make sure not sterile - very few bulls are actually tested