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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. Milk is 15% ________ and 85% __________.






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






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






4. 10-37 (21) days






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






6. The more stressed out the male is - the less sperm he is going to produce






7. Superior genes are _______ to multiply






8. Why does estrus happen before ovulation?






9. Failure to have both testis (gonads) descend






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






11. (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






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






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






14. Duct through penis that carries sperm and urine






15. 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






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






17. 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.






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






19. 19-23 (21) days






20. 147 days






21. 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.






22. 336 days






23. ~60 days before calving






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






25. (LH) causes female's egg to break (her period)






26. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.

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27. Important 'landmark' during palpation






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






29. 16-20 hours






30. 1-3 days






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






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






33. Failure to have one testis (gonad) to descend






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






35. 1. brain function - 2. blood flow - 3. willing female






36. 283 days






37. 16-20 hours






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






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






40. 24 hours before end of estrus cycle






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






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






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






44. 30 hours after estrus begins






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






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






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






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






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






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