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






2. 30 hours after estrus begins






3. Sperm production






4. Male on one pin and female on other side






5. 30-38 hours after estrus cycle begins






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






7. Important 'landmark' during palpation






8. Days which have increasing daylight hours

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9. (FSH) causes egg to mature in females






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






11. 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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12. Contains and regulates the temp of the testes for sperm production






13. Sperm is produced here






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






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






16. Birthing process (termination of gestation)






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






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






19. 19-23 (21) days






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






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






22. Produce testosterone. located between the seminiferous tubules






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






24. Duct through penis that carries sperm and urine






25. Actual heat cycle (period)






26. Allows extension of penis without fibro-elastic penis






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






28. What helps regulate spermatogenesis?






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






30. 30 hours after estrus begins






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






32. 19-23 (21) days






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






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






35. (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






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






37. Why does estrus happen before ovulation?






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






39. Implies the amount of estrogen production






40. Why Dairy calves are fed powdered milk.






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






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






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






45. 147 days






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






47. Scar tissue plugs up chambers of udder






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






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






50. 114 days