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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. 19-23 (21) days






2. Luteolysis happens because of the ____________ hormone






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






4. What helps regulate spermatogenesis?






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






6. Actual heat cycle (period)






7. When are dairy cattle dehorned?






8. 283 days






9. 283 days






10. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)






11. Male on one pin and female on other side






12. Allows extension of penis without fibro-elastic penis






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






14. 4-6 days






15. Important 'landmark' during palpation






16. Parturition is controlled by...






17. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)






18. When are steers and heifers weaned from bottle feeding?






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






20. 24 hours before end of estrus cycle






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






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

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






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






25. Provide nourishment for the developing sperm






26. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






27. When are steers and heifers weaned from bottle feeding?






28. 1-2 days






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






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






31. Produce testosterone. located between the seminiferous tubules






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






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






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






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






36. (FSH) causes egg to mature in females






37. 45-60 days after breeding; re-breed as required






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






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






40. 1-3 days






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






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






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






44. 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)






45. Provide nourishment for the developing sperm






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






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






48. 26 hours after estrus begins






49. 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)






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