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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. 336 days






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






3. ~60 days before calving






4. 1-2 days






5. Allows extension of penis without fibro-elastic penis






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






7. 16-20 hours






8. 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






9. 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.






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






11. Sperm is produced here






12. Implies the amount of estrogen production






13. 283 days






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






15. 45-60 days after breeding; re-breed as required






16. (male) pushes the testes outward toward the legs for a cool-down off of the body






17. Provide nourishment for the developing sperm






18. 30 hours after estrus begins






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. 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.






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






23. 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.






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






25. Why Dairy calves are fed powdered milk.






26. 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)






27. 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)






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






29. 24 hours before end of estrus cycle






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






31. 147 days






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






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






34. 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






35. Parturition is controlled by...






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






37. 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






38. 265-285 days






39. Allows extension of penis without fibro-elastic penis






40. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)






41. Provide nourishment for the developing sperm






42. Produce testosterone. located between the seminiferous tubules






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






44. Sperm production






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






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






47. Actual heat cycle (period)






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






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






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