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






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






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






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






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






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






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






8. 265-285 days






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






10. 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.






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






12. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






13. Why does estrus happen before ovulation?






14. 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.






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






16. 24 hours before end of estrus cycle






17. 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






18. 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)






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






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






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






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






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






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






25. 147 days






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






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






28. 26 hours after estrus begins






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






30. (FSH) causes egg to mature in females






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






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






33. Produce testosterone. located between the seminiferous tubules






34. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






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






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






37. Produce testosterone. located between the seminiferous tubules






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






39. 4-6 days






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






41. Sperm production






42. 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.






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






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






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






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






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






48. 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






49. 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.






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

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