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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. (male) pushes the testes upward toward the body for warmth or protection






2. 114 days






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






4. Larger the cow - more milk is produced; smaller the cow - less milk is produced






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






6. 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)






7. 30 hours after estrus begins






8. 147 days






9. Standing to be mounted (last one able to notice); mounting other animals; social behavior-restless - gregarious - activity - vocalizing; frequent urination; mucous discharge






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






11. Birthing process (termination of gestation)






12. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.

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13. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.






14. 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






15. Failure to have both testis (gonads) descend






16. ~305 days (altough often longer due to breeding difficulties)






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






18. 4-6 days






19. Days which have increasing daylight hours

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20. 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






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






22. Animal which has been castrated after puberty






23. Provide nourishment for the developing sperm






24. Implies the amount of estrogen production






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






26. Animals which have only one estrous cycle (ex: dog - fox)






27. 30-38 hours after estrus cycle begins






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






29. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)






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






31. Why does estrus happen before ovulation?






32. Contains and regulates the temp of the testes for sperm production






33. Help to signal hormone levels which we need both in the brain right next to each other.






34. 1-2 days






35. What about the sperm for a bull which has been castrated but still has testicles?






36. Superior genes are _______ to multiply






37. 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.






38. 114 days






39. 1-3 days






40. Can survive ~7 days in cow. vast majority <48 hours






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






42. Duct through penis that carries sperm and urine






43. What about the sperm for a bull which has been castrated but still has testicles?






44. 26 hours after estrus begins






45. ~305 days (altough often longer due to breeding difficulties)






46. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.






47. Depository for semen during insemination. where urine leaves the body






48. 2 month growth cycle. stored in the epididymis of the bull






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






50. 24 hours before end of estrus cycle