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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. Failure to have both testis (gonads) descend






2. ~60 days before calving






3. Duct through penis that carries sperm and urine






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






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






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






7. Scar tissue plugs up chambers of udder






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






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






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






11. Scar tissue plugs up chambers of udder






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






13. 19-23 (21) days






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






15. Implies the amount of estrogen production






16. When are dairy cattle dehorned?






17. Days which have decreasing daylight hours

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






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






20. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






21. 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.






22. FEED






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






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






25. Sperm production






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






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






28. 336 days






29. Animal which has been castrated after puberty






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






31. 30-38 hours after estrus cycle begins






32. Failure to have one testis (gonad) to descend






33. 10-37 (21) days






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






35. FEED






36. Not under a timeline - cow can not be sold as steak






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






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






39. 1-3 days






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

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41. 24 hours before end of estrus cycle






42. ~60 days before calving






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






44. 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)






45. Produce testosterone. located between the seminiferous tubules






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






47. Why Dairy calves are fed powdered milk.






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






49. Not under a timeline - cow can not be sold as steak






50. What helps regulate spermatogenesis?