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






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






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






4. 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.






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






6. Superior genes are _______ to multiply






7. Why Dairy calves are fed powdered milk.






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






9. Why does estrus happen before ovulation?






10. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING






11. 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






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






13. FEED






14. 283 days






15. 14-19 (17) days






16. Animal which has been castrated after puberty






17. 19-23 (21) days






18. Implies the amount of estrogen production






19. 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.






20. 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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21. When are steers and heifers weaned from bottle feeding?






22. 30 hours after estrus begins






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






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






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






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






27. 114 days






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






29. Larger the cow - more milk is produced; smaller the cow - less milk is produced






30. Provide nourishment for the developing sperm






31. When are dairy cattle dehorned?






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






33. 26 hours after estrus begins






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






35. 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)






36. 265-285 days






37. 2 month growth cycle. stored in the epididymis of the bull






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






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






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






41. 1-3 days






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






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






44. 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)






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






46. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.

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






48. Important 'landmark' during palpation






49. Sperm production






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