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






2. 4-6 days






3. Animal which has been castrated after puberty






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






5. (male) pushes the testes upward toward the body for warmth or protection






6. Implies the amount of estrogen production






7. 1-2 days






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






9. Parturition is controlled by...






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






11. 114 days






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






13. 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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14. 30 hours after estrus begins






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






16. What helps regulate spermatogenesis?






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






18. 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.






19. Microscopic - make sure not sterile - very few bulls are actually tested






20. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






21. 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.






22. Important 'landmark' during palpation






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






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






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






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






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






28. Days which have decreasing daylight hours

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29. Days which have decreasing daylight hours

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






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






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






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






34. Provide nourishment for the developing sperm






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






36. 265-285 days






37. 24 hours before end of estrus cycle






38. Male on one pin and female on other side






39. 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






40. Scar tissue plugs up chambers of udder






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






42. (male) pushes the testes upward toward the body for warmth or protection






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






44. Birthing process (termination of gestation)






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






46. When are dairy cattle dehorned?






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






48. (FSH) causes egg to mature in females






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






50. Days which have increasing daylight hours

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