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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. Front feet and head first. (except for hogs and dogs)






2. Implies the amount of estrogen production






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






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






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






6. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.






7. 19-23 (21) days






8. Failure to have both testis (gonads) descend






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






10. Sperm production






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






13. Urinary calculi.






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






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






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






17. (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






18. Sperm is produced here






19. 1-2 days






20. Male on one pin and female on other side






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






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






23. Why Dairy calves are fed powdered milk.






24. Days which have decreasing daylight hours

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






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






27. Days which have decreasing daylight hours

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28. 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)






29. 4-6 days






30. Birthing process (termination of gestation)






31. Luteolysis happens because of the ____________ hormone






32. 19-23 (21) days






33. 45-60 days after breeding; re-breed as required






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. 19-23 (21) days






36. Contains and regulates the temp of the testes for sperm production






37. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






38. 147 days






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






40. 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.






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






42. Sperm is produced here






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






44. What helps regulate spermatogenesis?






45. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation






46. 30 hours after estrus begins






47. When are dairy cattle dehorned?






48. 24 hours before end of estrus cycle






49. FEED






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







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