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






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






3. 1-2 days






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






5. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market






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






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






8. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market






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






10. 30 hours after estrus begins






11. 1. brain function - 2. blood flow - 3. willing female






12. Parturition is controlled by...






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






14. Superior genes are _______ to multiply






15. Why does estrus happen before ovulation?






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






17. Animal which has been castrated after puberty






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






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






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






21. 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.






22. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






23. When are dairy cattle dehorned?






24. Implies the amount of estrogen production






25. Why does estrus happen before ovulation?






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






27. 24 hours before end of estrus cycle






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






29. 265-285 days






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






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






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






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






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






35. 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)






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






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






38. 24 hours before end of estrus cycle






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






40. 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)






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






42. Why Dairy calves are fed powdered milk.






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






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






45. 10-37 (21) days






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






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






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






49. Help to signal hormone levels which we need both in the brain right next to each other.






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