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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. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.






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






3. 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.






4. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






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






6. Parturition is controlled by...






7. 24 hours before end of estrus cycle






8. FEED






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






10. 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






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






12. Birthing process (termination of gestation)






13. 19-23 (21) days






14. Urinary calculi.






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






16. 1-3 days






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






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






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






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






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






22. 30-38 hours after estrus cycle begins






23. 4-6 days






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






25. 10-37 (21) days






26. Male on one pin and female on other side






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






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






29. Scar tissue plugs up chambers of udder






30. 265-285 days






31. 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






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






33. 114 days






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






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






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






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






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






39. 10-37 (21) days






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






41. 1-2 days






42. Why does estrus happen before ovulation?






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






44. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






45. Provide nourishment for the developing sperm






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






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






48. Produce testosterone. located between the seminiferous tubules






49. 147 days






50. 336 days