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






3. Why does estrus happen before ovulation?






4. 4-6 days






5. Duct through penis that carries sperm and urine






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






7. 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






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






9. 147 days






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






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






12. 2 month growth cycle. stored in the epididymis of the bull






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






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






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






16. (FSH) causes egg to mature in females






17. Sperm production






18. When are dairy cattle dehorned?






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






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






21. Scar tissue plugs up chambers of udder






22. 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.






23. 30 hours after estrus begins






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






25. Allows extension of penis without fibro-elastic penis






26. 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)






27. 336 days






28. ~305 days (altough often longer due to breeding difficulties)






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






30. 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.






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






32. Failure to have both testis (gonads) descend






33. 14-19 (17) days






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






35. Animal which has been castrated after puberty






36. 283 days






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






38. Days which have increasing daylight hours

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






40. (male) pushes the testes outward toward the legs for a cool-down off of the body






41. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






42. Superior genes are _______ to multiply






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

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






45. 19-23 (21) days






46. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract






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






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






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






50. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells