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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. What makes the milk flow through the mammary glands?






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






3. FEED






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






5. 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)






6. Luteolysis happens because of the ____________ hormone






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






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






9. 16-20 hours






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






11. 14-19 (17) days






12. Days which have decreasing daylight hours

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13. Way to know everything is alright with the breeding male






14. 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.






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






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

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17. Failure to have both testis (gonads) descend






18. Birthing process (termination of gestation)






19. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off






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






21. Male on one pin and female on other side






22. (switzerland) 2nd in size and milk production - most muscle -






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






24. 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






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






26. What helps regulate spermatogenesis?






27. 2 month growth cycle. stored in the epididymis of the bull






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






29. ~305 days (altough often longer due to breeding difficulties)






30. 30-38 hours after estrus cycle begins






31. Why does estrus happen before ovulation?






32. Urinary calculi.






33. 265-285 days






34. 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.






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






36. 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






37. Actual heat cycle (period)






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






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






40. 4-6 days






41. 2 month growth cycle. stored in the epididymis of the bull






42. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total






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






44. Provide nourishment for the developing sperm






45. What helps regulate spermatogenesis?






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






47. Help to signal hormone levels which we need both in the brain right next to each other.






48. 336 days






49. ~60 days before calving






50. Contains and regulates the temp of the testes for sperm production