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






2. 265-285 days






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






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






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






6. 30 hours after estrus begins






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






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






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






10. Provide nourishment for the developing sperm






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






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






13. Actual heat cycle (period)






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






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






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






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






18. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm






19. 16-20 hours






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






21. 30 hours after estrus begins






22. 147 days






23. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)






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






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






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






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






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






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






30. Contains and regulates the temp of the testes for sperm production






31. Provide nourishment for the developing sperm






32. 2 month growth cycle. stored in the epididymis of the bull






33. Birthing process (termination of gestation)






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






35. Luteolysis happens because of the ____________ hormone






36. 16-20 hours






37. To remove/separate testicles from animal's body before animal reaches puberty






38. 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






39. ~305 days (altough often longer due to breeding difficulties)






40. 1-2 days






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






42. 30-38 hours after estrus cycle begins






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






44. 283 days






45. Parturition is controlled by...






46. ~60 days before calving






47. Produce testosterone. located between the seminiferous tubules






48. (FSH) causes egg to mature in females






49. 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.






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