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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. What makes the milk flow through the mammary glands?






2. 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






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






4. 14-19 (17) days






5. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market






6. What makes the milk flow through the mammary glands?






7. Superior genes are _______ to multiply






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






9. Duct through penis that carries sperm and urine






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






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






12. 24 hours before end of estrus cycle






13. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






14. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






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






16. Scar tissue plugs up chambers of udder






17. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract






18. 16-20 hours






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






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






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






22. Duct through penis that carries sperm and urine






23. Sperm production






24. Implies the amount of estrogen production






25. Start of the reproductive tract for the female. located outside of the body






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






27. Days which have decreasing daylight hours


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






29. Check feet and legs - look for masculine traits in build such as crest and muscling






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






31. Days which have decreasing daylight hours


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






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






34. 24 hours before end of estrus cycle






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






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






37. Why does estrus happen before ovulation?






38. Prevent the cow from getting an infection from the calve






39. Check feet and legs - look for masculine traits in build such as crest and muscling






40. Why Dairy calves are fed powdered milk.






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






42. 30 hours after estrus begins






43. To remove/separate testicles from animal's body before animal reaches puberty






44. 147 days






45. 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)






46. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.






47. Failure to have both testis (gonads) descend






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






49. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






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