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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. 24 hours before end of estrus cycle






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






3. Days which have decreasing daylight hours

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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. (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






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






7. 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.






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






9. (LH) causes female's egg to break (her period)






10. Important 'landmark' during palpation






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






12. What helps regulate spermatogenesis?






13. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat






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






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






16. FEED






17. Male on one pin and female on other side






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






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






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






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






22. 45-60 days after breeding; re-breed as required






23. 30-38 hours after estrus cycle begins






24. 16-20 hours






25. 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)






26. Produce testosterone. located between the seminiferous tubules






27. Allows extension of penis without fibro-elastic penis






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






29. 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






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






31. What helps regulate spermatogenesis?






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






33. Luteolysis happens because of the ____________ hormone






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






35. 24 hours before end of estrus cycle






36. Front feet and head first. (except for hogs and dogs)






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






38. 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






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






40. 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.






41. Provide nourishment for the developing sperm






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






43. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)






44. 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.






45. Days which have increasing daylight hours

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46. Standing to be mounted (last one able to notice); mounting other animals; social behavior-restless - gregarious - activity - vocalizing; frequent urination; mucous discharge






47. 14-19 (17) days






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






49. Allows extension of penis without fibro-elastic penis






50. Why Dairy calves are fed powdered milk.