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






2. Allows extension of penis without fibro-elastic penis






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






4. 1-3 days






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






6. Standing to be mounted (last one able to notice); mounting other animals; social behavior-restless - gregarious - activity - vocalizing; frequent urination; mucous discharge






7. 147 days






8. FEED






9. Duct through penis that carries sperm and urine






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






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






12. 1-2 days






13. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






14. 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






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






16. 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






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






18. Birthing process (termination of gestation)






19. Failure to have both testis (gonads) descend






20. 114 days






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






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






23. 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.






24. 30 hours after estrus begins






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






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






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






28. Sperm production






29. Days which have increasing daylight hours

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






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






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






33. 14-19 (17) days






34. ~305 days (altough often longer due to breeding difficulties)






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






36. Implies the amount of estrogen production






37. Luteolysis happens because of the ____________ hormone






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






39. 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.






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






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






42. 19-23 (21) days






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






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






45. Standing to be mounted (last one able to notice); mounting other animals; social behavior-restless - gregarious - activity - vocalizing; frequent urination; mucous discharge






46. Sperm production






47. Days which have decreasing daylight hours

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48. Days which have decreasing daylight hours

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






50. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.