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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. (FSH) causes egg to mature in females






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






3. 16-20 hours






4. 30-38 hours after estrus cycle begins






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






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






7. Implies the amount of estrogen production






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






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






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






11. 19-23 (21) days






12. 1-3 days






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






14. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.

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15. Allows extension of penis without fibro-elastic penis






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






17. 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.






18. Duct through penis that carries sperm and urine






19. Not under a timeline - cow can not be sold as steak






20. 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.






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






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






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






24. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.

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






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






27. 30-38 hours after estrus cycle begins






28. Urinary calculi.






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






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






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






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






33. What helps regulate spermatogenesis?






34. 24 hours before end of estrus cycle






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






36. Scar tissue plugs up chambers of udder






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






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






39. 30 hours after estrus begins






40. Sperm is produced here






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






42. Important 'landmark' during palpation






43. 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)






44. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.

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






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






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






48. Not under a timeline - cow can not be sold as steak






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






50. 16-20 hours