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






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






3. Actual heat cycle (period)






4. 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.






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






6. 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






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






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






9. Why does estrus happen before ovulation?






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






11. Produce testosterone. located between the seminiferous tubules






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






13. Days which have increasing daylight hours

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






15. (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






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






17. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






18. 30 hours after estrus begins






19. 4-6 days






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






21. 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)






22. Luteolysis happens because of the ____________ hormone






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






24. 114 days






25. 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.






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






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






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






29. ~305 days (altough often longer due to breeding difficulties)






30. 147 days






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






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






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






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






35. Birthing process (termination of gestation)






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






37. Allows extension of penis without fibro-elastic penis






38. 2 month growth cycle. stored in the epididymis of the bull






39. Allows extension of penis without fibro-elastic penis






40. 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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41. Depository for semen during insemination. where urine leaves the body






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






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






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






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






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






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






48. 14-19 (17) days






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






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