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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. 336 days






2. Why does estrus happen before ovulation?






3. Why Dairy calves are fed powdered milk.






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






5. Sperm production






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






7. ~305 days (altough often longer due to breeding difficulties)






8. (LH) stimulates the Leydig cells to produce testosterone






9. 265-285 days






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






11. Implies the amount of estrogen production






12. 45-60 days after breeding; re-breed as required






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






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






15. Days which have decreasing daylight hours

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






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






19. What helps regulate spermatogenesis?






20. (FSH) causes egg to mature in females






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






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






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






24. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






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






26. Sperm is produced here






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






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






29. (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






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






31. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase






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






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






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






35. Days which have increasing daylight hours

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36. 4-6 days






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






38. 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.






39. 14-19 (17) days






40. Can survive ~7 days in cow. vast majority <48 hours






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






42. 24 hours before end of estrus cycle






43. 10-37 (21) days






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






45. 24 hours before end of estrus cycle






46. Failure to have both testis (gonads) descend






47. 1-2 days






48. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract






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






50. 283 days