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






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






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






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






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






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






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






8. Actual heat cycle (period)






9. Why Dairy calves are fed powdered milk.






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






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






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






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






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






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






16. 1-2 days






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






18. 114 days






19. 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.






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






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






22. Why Dairy calves are fed powdered milk.






23. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






24. 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






25. 16-20 hours






26. What helps regulate spermatogenesis?






27. 4-6 days






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






29. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.


30. (FSH) causes egg to mature in females






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






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






33. 283 days






34. 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






35. Luteolysis happens because of the ____________ hormone






36. 16-20 hours






37. When are dairy cattle dehorned?






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


39. Urinary calculi.






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






41. Birthing process (termination of gestation)






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






43. Implies the amount of estrogen production






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






45. 19-23 (21) days






46. 2 month growth cycle. stored in the epididymis of the bull






47. 30 hours after estrus begins






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






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






50. 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