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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. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






2. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






3. 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)






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






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






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






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






8. 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.






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






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






11. FEED






12. Actual heat cycle (period)






13. 30 hours after estrus begins






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






15. Days which have increasing daylight hours

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






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






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






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






20. (FSH) causes egg to mature in females






21. Why does estrus happen before ovulation?






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






23. 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






24. 1-3 days






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






26. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






27. What helps regulate spermatogenesis?






28. 19-23 (21) days






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






30. 14-19 (17) days






31. 1-2 days






32. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.






33. Urinary calculi.






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






35. When are dairy cattle dehorned?






36. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






37. 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.






38. 147 days






39. Important 'landmark' during palpation






40. 45-60 days after breeding; re-breed as required






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






42. Why Dairy calves are fed powdered milk.






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






44. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off






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






46. Failure to have both testis (gonads) descend






47. 114 days






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






49. 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.






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