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






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






3. 147 days






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






5. 26 hours after estrus begins






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






7. Scar tissue plugs up chambers of udder






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

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






10. 24 hours before end of estrus cycle






11. Why does estrus happen before ovulation?






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






13. Animal which has been castrated after puberty






14. ~305 days (altough often longer due to breeding difficulties)






15. (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






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






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






18. Sperm is produced here






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






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






21. 265-285 days






22. 45-60 days after breeding; re-breed as required






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






24. FEED






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






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






27. 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.






28. Important 'landmark' during palpation






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






30. Why Dairy calves are fed powdered milk.






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






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






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






34. 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.






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






36. 10-37 (21) days






37. The more stressed out the male is - the less sperm he is going to produce






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






39. Provide nourishment for the developing sperm






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






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






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






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






44. 1-2 days






45. Larger the cow - more milk is produced; smaller the cow - less milk is produced






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






47. 4-6 days






48. Parturition is controlled by...






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






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