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






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






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






4. When are dairy cattle dehorned?






5. 283 days






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






7. 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.






8. 45-60 days after breeding; re-breed as required






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






10. 19-23 (21) days






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






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






13. FEED






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






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

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






17. 114 days






18. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.






19. Produce testosterone. located between the seminiferous tubules






20. 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)






21. 19-23 (21) days






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






23. Sperm production






24. Superior genes are _______ to multiply






25. 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)






26. 24 hours before end of estrus cycle






27. 2 month growth cycle. stored in the epididymis of the bull






28. 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.






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






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






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






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






33. Allows extension of penis without fibro-elastic penis






34. Important 'landmark' during palpation






35. 30 hours after estrus begins






36. Why Dairy calves are fed powdered milk.






37. Male on one pin and female on other side






38. Why does estrus happen before ovulation?






39. 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






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






41. Actual heat cycle (period)






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






43. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)






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






45. Scar tissue plugs up chambers of udder






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






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






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






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






50. Superior genes are _______ to multiply