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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. Failure to have both testis (gonads) descend






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






3. 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






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






5. Implies the amount of estrogen production






6. 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






7. Sperm is produced here






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






9. 45-60 days after breeding; re-breed as required






10. 10-37 (21) days






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






12. 265-285 days






13. Allows extension of penis without fibro-elastic penis






14. 147 days






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






16. 114 days






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






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






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






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






21. Superior genes are _______ to multiply






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






23. (FSH) causes egg to mature in females






24. 24 hours before end of estrus cycle






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






26. Urinary calculi.






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


28. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed






29. When are dairy cattle dehorned?






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






31. 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.






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






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






34. 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)






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






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






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






38. 30 hours after estrus begins






39. Produce testosterone. located between the seminiferous tubules






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






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






42. 283 days






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






44. Milk ~305 days - dry 60 days prior to calving






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






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






47. 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.


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






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






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