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






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






3. Why does estrus happen before ovulation?






4. What helps regulate spermatogenesis?






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






6. (male) pushes the testes upward toward the body for warmth or protection






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






8. 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)






9. 2 month growth cycle. stored in the epididymis of the bull






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






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






12. 336 days






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






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






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






16. 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






17. (male) pushes the testes outward toward the legs for a cool-down off of the body






18. Male on one pin and female on other side






19. Sperm is produced here






20. 16-20 hours






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






22. 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.






23. 147 days






24. 4-6 days






25. Duct through penis that carries sperm and urine






26. Why Dairy calves are fed powdered milk.






27. Duct through penis that carries sperm and urine






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






29. Important 'landmark' during palpation






30. When are dairy cattle dehorned?






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






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






33. 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.






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






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






36. Days which have decreasing daylight hours

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37. 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.

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38. FEED






39. 24 hours before end of estrus cycle






40. 2 month growth cycle. stored in the epididymis of the bull






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






42. Superior genes are _______ to multiply






43. 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)






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






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






46. 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.






47. Actual heat cycle (period)






48. 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.






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






50. Days which have increasing daylight hours

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