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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. What makes the milk flow through the mammary glands?






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






3. ~60 days before calving






4. 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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5. 10-37 (21) days






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






7. Provide nourishment for the developing sperm






8. Provide nourishment for the developing sperm






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






10. 16-20 hours






11. 1-3 days






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






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






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






15. (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






16. 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.






17. ~60 days before calving






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






19. 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.






20. What helps regulate spermatogenesis?






21. Produce testosterone. located between the seminiferous tubules






22. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders






23. Why does estrus happen before ovulation?






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

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25. (FSH) causes egg to mature in females






26. FEED






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






28. Days which have decreasing daylight hours

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29. Implies the amount of estrogen production






30. Urinary calculi.






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






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






33. Actual heat cycle (period)






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






35. 14-19 (17) days






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






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






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






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






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






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






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






43. 30 hours after estrus begins






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






45. FEED






46. Birthing process (termination of gestation)






47. 114 days






48. Urinary calculi.






49. 14-19 (17) days






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