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






2. Failure to have one testis (gonad) to descend






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






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






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






6. 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.






7. (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






8. Birthing process (termination of gestation)






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






10. Duct through penis that carries sperm and urine






11. 4-6 days






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






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






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






15. Days which have decreasing daylight hours

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






17. Luteolysis happens because of the ____________ hormone






18. 1-3 days






19. Provide nourishment for the developing sperm






20. Failure to have both testis (gonads) descend






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






24. Parturition is controlled by...






25. 45-60 days after breeding; re-breed as required






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






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






28. Implies the amount of estrogen production






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






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






31. What helps regulate spermatogenesis?






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






33. 16-20 hours






34. 1-2 days






35. 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.






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






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






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






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






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






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






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






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






44. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood






45. 336 days






46. 26 hours after estrus begins






47. Castration tool which clamps down on the vans deferens. causes the sperm to not reach the penis to be ejaculated






48. 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






49. Way to know everything is alright with the breeding male






50. 1-3 days