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






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






3. 24 hours before end of estrus cycle






4. What helps regulate spermatogenesis?






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






6. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total






7. 26 hours after estrus begins






8. 45-60 days after breeding; re-breed as required






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






10. Days which have decreasing daylight hours

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11. 283 days






12. Why Dairy calves are fed powdered milk.






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






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






15. 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)






16. 45-60 days after breeding; re-breed as required






17. 114 days






18. 1-2 days






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






20. 30-38 hours after estrus cycle begins






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






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






23. 26 hours after estrus begins






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






25. 10-37 (21) days






26. When are dairy cattle dehorned?






27. 19-23 (21) days






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






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






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






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






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






33. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






34. Important 'landmark' during palpation






35. 19-23 (21) days






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






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






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






39. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm






40. Why does estrus happen before ovulation?






41. Produce testosterone. located between the seminiferous tubules






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






43. 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






44. ~305 days (altough often longer due to breeding difficulties)






45. Sperm production






46. 10-37 (21) days






47. Implies the amount of estrogen production






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






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. Birthing process (termination of gestation)