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






2. Superior genes are _______ to multiply






3. Parturition is controlled by...






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






5. ~305 days (altough often longer due to breeding difficulties)






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






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






8. 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.






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






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






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






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






13. Provide nourishment for the developing sperm






14. Male on one pin and female on other side






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






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






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






18. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract






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






20. 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)






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






22. 265-285 days






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






24. Sperm production






25. Scar tissue plugs up chambers of udder






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






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






28. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)






29. 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.






30. Produce testosterone. located between the seminiferous tubules






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. Sperm production






33. Sperm is produced here






34. Duct through penis that carries sperm and urine






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






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






37. Why does estrus happen before ovulation?






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






39. Animal which has been castrated after puberty






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






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






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






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






44. Urinary calculi.






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






46. Parturition is controlled by...






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






48. 1-3 days






49. 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






50. 10-37 (21) days