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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. What helps regulate spermatogenesis?






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






3. 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.






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






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






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






7. Male on one pin and female on other side






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






9. 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.






10. 4-6 days






11. What helps regulate spermatogenesis?






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

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






14. Allows extension of penis without fibro-elastic penis






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






16. 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)






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






18. Failure to have one testis (gonad) to descend






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






20. ~305 days (altough often longer due to breeding difficulties)






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






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






23. Luteolysis happens because of the ____________ hormone






24. 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.






25. 16-20 hours






26. 10-37 (21) days






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






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






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






30. Actual heat cycle (period)






31. 1-3 days






32. Urinary calculi.






33. Allows extension of penis without fibro-elastic penis






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






35. 24 hours before end of estrus cycle






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






37. Duct through penis that carries sperm and urine






38. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






39. 45-60 days after breeding; re-breed as required






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






41. (switzerland) 2nd in size and milk production - most muscle -






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






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






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






45. 147 days






46. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.






47. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.






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






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






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