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






2. 19-23 (21) days






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






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






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






6. Look for infection - split - and rupture of the penis






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






8. Sperm is produced here






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






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






11. ~305 days (altough often longer due to breeding difficulties)






12. 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.






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






14. Actual heat cycle (period)






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






16. Sperm is produced here






17. What helps regulate spermatogenesis?






18. Male on one pin and female on other side






19. Days which have decreasing daylight hours

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






22. 336 days






23. 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.






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






25. 14-19 (17) days






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






27. Allows extension of penis without fibro-elastic penis






28. 30 hours after estrus begins






29. Allows extension of penis without fibro-elastic penis






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






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






32. Failure to have both testis (gonads) descend






33. 16-20 hours






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






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






36. 1-3 days






37. 4-6 days






38. Luteolysis happens because of the ____________ hormone






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






40. (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






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






42. 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.






43. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market






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






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






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






47. Animal which has been castrated after puberty






48. 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.






49. Superior genes are _______ to multiply






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