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






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






4. 1-3 days






5. 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.






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






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






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






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






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






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






12. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off






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






14. Allows extension of penis without fibro-elastic penis






15. Duct through penis that carries sperm and urine






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






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






18. Superior genes are _______ to multiply






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

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20. (FSH) causes egg to mature in females






21. 10-37 (21) days






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






23. Sperm is produced here






24. Actual heat cycle (period)






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






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






27. Start of the reproductive tract for the female. located outside of the body






28. (FSH) causes egg to mature in females






29. Why does estrus happen before ovulation?






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






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






32. 45-60 days after breeding; re-breed as required






33. Luteolysis happens because of the ____________ hormone






34. Days which have increasing daylight hours

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35. 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)






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






37. 19-23 (21) days






38. Days which have decreasing daylight hours

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39. 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.






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






41. What helps regulate spermatogenesis?






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






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






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






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






46. Microscopic - make sure not sterile - very few bulls are actually tested






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






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






49. 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






50. Important 'landmark' during palpation