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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. Allows extension of penis without fibro-elastic penis






2. 16-20 hours






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






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






5. Can survive ~7 days in cow. vast majority <48 hours






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






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






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






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






10. Why does estrus happen before ovulation?






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






12. (FSH) causes egg to mature in females






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






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






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






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






17. Implies the amount of estrogen production






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






19. Allows extension of penis without fibro-elastic penis






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






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






22. 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)






23. Produce testosterone. located between the seminiferous tubules






24. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.






25. 30-38 hours after estrus cycle begins






26. Important 'landmark' during palpation






27. Actual heat cycle (period)






28. 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.

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29. 4-6 days






30. Animals which have only one estrous cycle (ex: dog - fox)






31. Can survive ~7 days in cow. vast majority <48 hours






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






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






34. Duct through penis that carries sperm and urine






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






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






37. 45-60 days after breeding; re-breed as required






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






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






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






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






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






43. 1-3 days






44. ~305 days (altough often longer due to breeding difficulties)






45. 1-3 days






46. 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.






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






48. Birthing process (termination of gestation)






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






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