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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. Failure to have both testis (gonads) descend






2. 19-23 (21) days






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






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






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






6. 19-23 (21) days






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






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






9. Days which have decreasing daylight hours

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10. 2 month growth cycle. stored in the epididymis of the bull






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






12. 265-285 days






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






14. Important 'landmark' during palpation






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






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






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






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






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






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






21. 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






22. 45-60 days after breeding; re-breed as required






23. 147 days






24. Sperm production






25. 283 days






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






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






28. ~305 days (altough often longer due to breeding difficulties)






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






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






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






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






33. Implies the amount of estrogen production






34. Why Dairy calves are fed powdered milk.






35. What helps regulate spermatogenesis?






36. 30 hours after estrus begins






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






38. Produce testosterone. located between the seminiferous tubules






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






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






41. 30 hours after estrus begins






42. Produce testosterone. located between the seminiferous tubules






43. Why does estrus happen before ovulation?






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






45. 10-37 (21) days






46. 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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47. What makes the milk flow through the mammary glands?






48. Allows extension of penis without fibro-elastic penis






49. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






50. Important 'landmark' during palpation