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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. ~60 days before calving






2. 1-2 days






3. Produce testosterone. located between the seminiferous tubules






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






5. Scar tissue plugs up chambers of udder






6. Why does estrus happen before ovulation?






7. ~60 days before calving






8. 16-20 hours






9. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat






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






11. 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.






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






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






14. 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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15. 265-285 days






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






17. Actual heat cycle (period)






18. 30-38 hours after estrus cycle begins






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






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






21. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase






22. 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.






23. 45-60 days after breeding; re-breed as required






24. (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






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






26. Why Dairy calves are fed powdered milk.






27. Superior genes are _______ to multiply






28. Days which have decreasing daylight hours

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29. Animal which has been castrated after puberty






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






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






32. 336 days






33. Days which have increasing daylight hours

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34. (FSH) causes egg to mature in females






35. When are dairy cattle dehorned?






36. 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.






37. Male on one pin and female on other side






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






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






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






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






42. Sperm is produced here






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






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






45. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood






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






47. Implies the amount of estrogen production






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






49. 19-23 (21) days






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