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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. 30-38 hours after estrus cycle begins






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






3. 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.






4. Urinary calculi.






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






6. ~60 days before calving






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






8. Days which have increasing daylight hours

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9. Prevent the cow from getting an infection from the calve






10. Implies the amount of estrogen production






11. 4-6 days






12. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %






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






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






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






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






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






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

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19. 14-19 (17) days






20. 1-2 days






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






22. Luteolysis happens because of the ____________ hormone






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






24. Animals which have many estrous periods per year (ex: cow - sow)






25. 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






26. Animals which have only one estrous cycle (ex: dog - fox)






27. ~60 days before calving






28. 265-285 days






29. ~305 days (altough often longer due to breeding difficulties)






30. 45-60 days after breeding; re-breed as required






31. 1-3 days






32. 265-285 days






33. When are dairy cattle dehorned?






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






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






36. Male on one pin and female on other side






37. 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)






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






39. Duct through penis that carries sperm and urine






40. Scar tissue plugs up chambers of udder






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






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






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






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






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






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






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






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






49. Failure to have both testis (gonads) descend






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