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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. 1-2 days






2. 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.






3. When are steers and heifers weaned from bottle feeding?






4. 14-19 (17) days






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






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






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






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






9. 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.


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






11. Allows extension of penis without fibro-elastic penis






12. Produce testosterone. located between the seminiferous tubules






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






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


15. 30 hours after estrus begins






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






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






18. 283 days






19. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






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






21. 26 hours after estrus begins






22. 30-38 hours after estrus cycle begins






23. 114 days






24. Luteolysis happens because of the ____________ hormone






25. 24 hours before end of estrus cycle






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






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






28. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






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






30. Why does estrus happen before ovulation?






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






32. 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)






33. Why Dairy calves are fed powdered milk.






34. (FSH) causes egg to mature in females






35. 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.






36. FEED






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






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






39. Superior genes are _______ to multiply






40. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






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






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






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






44. FEED






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






46. When are dairy cattle dehorned?






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






48. 283 days






49. Actual heat cycle (period)






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