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






2. Implies the amount of estrogen production






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






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






5. 336 days






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






7. (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






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






9. Allows extension of penis without fibro-elastic penis






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






11. (FSH) causes egg to mature in females






12. When are dairy cattle dehorned?






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






14. Failure to have both testis (gonads) descend






15. 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






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






17. 19-23 (21) days






18. Birthing process (termination of gestation)






19. Why Dairy calves are fed powdered milk.






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






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






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






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






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






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






26. Superior genes are _______ to multiply






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






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






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






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






31. Front feet and head first. (except for hogs and dogs)






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






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






34. Important 'landmark' during palpation






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






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






37. 265-285 days






38. ~305 days (altough often longer due to breeding difficulties)






39. Implies the amount of estrogen production






40. Provide nourishment for the developing sperm






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






42. ~60 days before calving






43. ~305 days (altough often longer due to breeding difficulties)






44. When are steers and heifers weaned from bottle feeding?






45. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING






46. 283 days






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






48. Scar tissue plugs up chambers of udder






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






50. Luteolysis happens because of the ____________ hormone