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






2. 283 days






3. Male on one pin and female on other side






4. ~305 days (altough often longer due to breeding difficulties)






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






7. 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.






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






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






10. Look for infection - split - and rupture of the penis






11. 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






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






13. 24 hours before end of estrus cycle






14. Implies the amount of estrogen production






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






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






17. 10-37 (21) days






18. (LH) causes female's egg to break (her period)






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

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






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






22. 114 days






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






24. 336 days






25. 10-37 (21) days






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






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






28. Luteolysis happens because of the ____________ hormone






29. 19-23 (21) days






30. Days which have decreasing daylight hours

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






32. 26 hours after estrus begins






33. Birthing process (termination of gestation)






34. When are dairy cattle dehorned?






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






36. (FSH) causes egg to mature in females






37. FEED






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






39. 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)






40. 265-285 days






41. 16-20 hours






42. 4-6 days






43. 45-60 days after breeding; re-breed as required






44. Why does estrus happen before ovulation?






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

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46. Important 'landmark' during palpation






47. 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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48. 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.






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






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