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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. 10-37 (21) days






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






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






4. 114 days






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






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






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






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






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






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






11. What helps regulate spermatogenesis?






12. Parturition is controlled by...






13. Scar tissue plugs up chambers of udder






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






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






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






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






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






19. (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






20. Days which have decreasing daylight hours

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






22. Birthing process (termination of gestation)






23. Failure to have both testis (gonads) descend






24. Implies the amount of estrogen production






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






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






27. Sperm is produced here






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






29. 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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30. Milk is 15% ________ and 85% __________.






31. Allows extension of penis without fibro-elastic penis






32. Provide nourishment for the developing sperm






33. ~305 days (altough often longer due to breeding difficulties)






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






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






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






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






38. Luteolysis happens because of the ____________ hormone






39. Superior genes are _______ to multiply






40. 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






41. 147 days






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






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






44. Larger the cow - more milk is produced; smaller the cow - less milk is produced






45. When are dairy cattle dehorned?






46. 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.






47. 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.






48. 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)






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






50. Why does estrus happen before ovulation?