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






2. 10-37 (21) days






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






4. 30-38 hours after estrus cycle begins






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






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






7. 24 hours before end of estrus cycle






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






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






11. Implies the amount of estrogen production






12. Luteolysis happens because of the ____________ hormone






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






14. Duct through penis that carries sperm and urine






15. 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






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






17. Luteolysis happens because of the ____________ hormone






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






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






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






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






22. Look for infection - split - and rupture of the penis






23. Allows extension of penis without fibro-elastic penis






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






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






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






27. Implies the amount of estrogen production






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






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






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






31. 265-285 days






32. 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.






33. 19-23 (21) days






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






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

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37. 19-23 (21) days






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






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






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






41. Produce testosterone. located between the seminiferous tubules






42. 26 hours after estrus begins






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






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






45. 14-19 (17) days






46. 147 days






47. Superior genes are _______ to multiply






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






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






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