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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. Failure to have both testis (gonads) descend






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






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






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






6. Scar tissue plugs up chambers of udder






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






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






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






10. 283 days






11. FEED






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






13. Allows extension of penis without fibro-elastic penis






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






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






16. 45-60 days after breeding; re-breed as required






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






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






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






20. Luteolysis happens because of the ____________ hormone






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






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






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






24. 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.






25. When are dairy cattle dehorned?






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

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






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






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






30. When are dairy cattle dehorned?






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






32. 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






33. 147 days






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






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






36. Superior genes are _______ to multiply






37. Prevent the cow from getting an infection from the calve






38. 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






39. Why Dairy calves are fed powdered milk.






40. 19-23 (21) days






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






42. 265-285 days






43. 2 month growth cycle. stored in the epididymis of the bull






44. 30 hours after estrus begins






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






46. Scar tissue plugs up chambers of udder






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






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






49. Produce testosterone. located between the seminiferous tubules






50. Animals which have many estrous periods per year (ex: cow - sow)