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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
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  • 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. 283 days






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






3. Produce testosterone. located between the seminiferous tubules






4. 10-37 (21) days






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






6. Provide nourishment for the developing sperm






7. Animal which has been castrated after puberty






8. ~305 days (altough often longer due to breeding difficulties)






9. Days which have increasing daylight hours

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10. 24 hours before end of estrus cycle






11. Important 'landmark' during palpation






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






13. % of fat in milk. makes cheeses and ice cream. regulates cost of milk






14. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers






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






16. What helps regulate spermatogenesis?






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






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






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






20. Male on one pin and female on other side






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






22. Superior genes are _______ to multiply






23. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.






24. Days which have increasing daylight hours

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






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






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






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






29. Luteolysis happens because of the ____________ hormone






30. ~60 days before calving






31. 19-23 (21) days






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






33. Sperm production






34. Sperm is produced here






35. Birthing process (termination of gestation)






36. To remove/separate testicles from animal's body before animal reaches puberty






37. (FSH) causes egg to mature in females






38. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase






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






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






41. When are dairy cattle dehorned?






42. 147 days






43. What helps regulate spermatogenesis?






44. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






45. FEED






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






47. Why does estrus happen before ovulation?






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






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






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







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