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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. Luteolysis happens because of the ____________ hormone






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






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






4. Luteolysis happens because of the ____________ hormone






5. 4-6 days






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. 147 days






8. 30-38 hours after estrus cycle begins






9. 114 days






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






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






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






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






14. Days which have increasing daylight hours

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






16. The more stressed out the male is - the less sperm he is going to produce






17. Sperm is produced here






18. Parturition is controlled by...






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






20. Why does estrus happen before ovulation?






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






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






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






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






25. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.






26. 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)






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






28. 1-2 days






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






30. Sperm is produced here






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






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






33. (FSH) causes egg to mature in females






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






35. 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.






36. 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.






37. Duct through penis that carries sperm and urine






38. To remove/separate testicles from animal's body before animal reaches puberty






39. Sperm production






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






41. 16-20 hours






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






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






44. (LH) stimulates the Leydig cells to produce testosterone






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






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






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






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






49. (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






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