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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
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  • 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. 1-2 days






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


3. Why Dairy calves are fed powdered milk.






4. 16-20 hours






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






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






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






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






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






10. Scar tissue plugs up chambers of udder






11. 283 days






12. Produce testosterone. located between the seminiferous tubules






13. 336 days






14. Start of the reproductive tract for the female. located outside of the body






15. 30-38 hours after estrus cycle begins






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






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






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






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






20. 283 days






21. Male on one pin and female on other side






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






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






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






25. Actual heat cycle (period)






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






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






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






29. Produce testosterone. located between the seminiferous tubules






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






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






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. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.






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






35. Duct through penis that carries sperm and urine






36. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.






37. What helps regulate spermatogenesis?






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






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






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






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






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






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






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






45. 30-38 hours after estrus cycle begins






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






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






48. 16-20 hours






49. Important 'landmark' during palpation






50. Why Dairy calves are fed powdered milk.