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






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






3. 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)






4. 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)






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






6. 24 hours before end of estrus cycle






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






8. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






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






10. 19-23 (21) days






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






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






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






14. 45-60 days after breeding; re-breed as required






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






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






17. Implies the amount of estrogen production






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






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






20. Implies the amount of estrogen production






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






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






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






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






25. 147 days






26. 26 hours after estrus begins






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






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






29. Provide nourishment for the developing sperm






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






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






32. Why Dairy calves are fed powdered milk.






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






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






35. Animal which has been castrated after puberty






36. 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






37. 4-6 days






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






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






40. 147 days






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






42. Days which have increasing daylight hours

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






44. Parturition is controlled by...






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






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






47. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)






48. Duct through penis that carries sperm and urine






49. 16-20 hours






50. 30-38 hours after estrus cycle begins