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Test your basic knowledge |
Dairy Cattle And Reproduction
Start Test
Study First
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. 24 hours before end of estrus cycle
mare ovulation
leydid or interstitial cells
polyestrous
reasons for castration
2. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %
Jersey Cow
testosterone
reasons for castration
penis and prepuce observation (BSE)
3. Days which have decreasing daylight hours
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4. 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.
Holstein Cow
burdizzo
mastitis
why does the cow need fat deposits during pregnancy?
5. (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
colostrum
epididymis: definition - 3 parts - 4 functions
scrotum
leydid or interstitial cells
6. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.
Jersey Cow
dartos muscle
Follical Stimulating in males
oviducts
7. 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.
uterus
pelvis
rectal palpation (BSE)
reasons for castration
8. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.
estrous
hormones
oviducts
effects of BST
9. (LH) causes female's egg to break (her period)
behavioral signs of estrus
kidney stones also called ________ ___________ can develop in the sigmoid flexure
Lutinizing Hormone in females
femininity of a heifer
10. Important 'landmark' during palpation
scrotal circumference (BSE)
cryptorchid
normal presentation of the fetus
cervix
11. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.
pelvis
Sperm growth rate
Grading choice
uterus
12. What helps regulate spermatogenesis?
monorchid
Brown Swiss Cow
testosterone
hormones
13. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat
estrous
femininity of a heifer
Holstein Cow
mare ovulation
14. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg
cow ovulation
butterfat
sperm cell
Jersey Cow
15. 1. brain function - 2. blood flow - 3. willing female
what has to happen for males for copulation to occur
castration
Lutinizing Hormone in males
rectal palpation (BSE)
16. FEED
cow gestation
sow estrus
mare's estrous cycle
#1 cost in production
17. Male on one pin and female on other side
age and castration
1. more cost effective - 2. powdered milk is in excess production
libido test (BSE)
cow gestation
18. Look for infection - split - and rupture of the penis
sow gestation
estrus
colostrum
penis and prepuce observation (BSE)
19. Not under a timeline - cow can not be sold as steak
Hard
cow estrus cycle
retractor muscles
Grading choice
20. What makes the milk flow through the mammary glands?
monorchid
testosterone
Size of cow in relation to the amount of milk produced
Blood
21. Can survive ~7 days in cow. vast majority <48 hours
Dairy Cattle Lactation (standard)
functions of progestrone
Sperm survival specs
reason for seasonal breeding periods
22. 45-60 days after breeding; re-breed as required
estrus
effects of estrogen
dairy cattle pregnancy check
growth lost from castration methods (knife & band)
23. 30-38 hours after estrus cycle begins
dry matter and water
6-8 weeks
feeding a high producing dairy cow
sow ovulation
24. 16-20 hours
cremaster muscle
purpose of Breeding Soundness Exam (BSE) for males
cow estrus
vulva
25. 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)
feeding a high producing dairy cow
reasons for castration
sow gestation
pelvis
26. Produce testosterone. located between the seminiferous tubules
leydid or interstitial cells
Sperm survival specs
reasons for castration
mare ovulation
27. Allows extension of penis without fibro-elastic penis
oviducts
sigmoid flexure
dry-off time in dairy cattle
sow ovulation
28. What makes the milk flow through the mammary glands?
Dairy calves are removed from cow at birth to...
organs used in spermatogenesis
van deferens
Blood
29. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co
Sperm growth rate
Jersey Cow
kidney stones also called ________ ___________ can develop in the sigmoid flexure
effects of BST
30. (LH) stimulates the Leydig cells to produce testosterone
sow estrus cycle
Lutinizing Hormone in males
uterus
uterus
31. What helps regulate spermatogenesis?
testis (gonads)
ewe's estrous cycle
testosterone
prostate gland
32. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)
leydid or interstitial cells
dry-off time in dairy cattle
estrous
ewe ovulation
33. Luteolysis happens because of the ____________ hormone
growth lost from castration methods (knife & band)
prostaglandin
Jersey Cow
Dairy Cattle Lactation (standard)
34. Failure to have one testis (gonad) to descend
6-8 weeks
monorchid
urethra
penis and prepuce observation (BSE)
35. 24 hours before end of estrus cycle
sperm cell
Holstein Cow
mare ovulation
what has to happen for males for copulation to occur
36. Front feet and head first. (except for hogs and dogs)
burdizzo
testosterone
Grading choice
normal presentation of the fetus
37. What about the sperm for a bull which has been castrated but still has testicles?
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
scrotum
libido test (BSE)
things to check for in a breeding soundness exam (BSE)
38. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co
penis sizes vs delivering methods
ewe gestation
Follical Stimulating in males
effects of BST
39. Milk is 15% ________ and 85% __________.
dry matter and water
Avg. bull specs
sigmoid flexure
kidney stones also called ________ ___________ can develop in the sigmoid flexure
40. 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.
Culls bulls earlier (2 reasons)
mare estrus
vulva
Where livelihood is in agriculture
41. Provide nourishment for the developing sperm
dairy cattle pregnancy check
sertoli cells
Hormones from both the fetus and the mom.
epididymis: definition - 3 parts - 4 functions
42. Not under a timeline - cow can not be sold as steak
ewe estrus
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
Grading choice
1. more cost effective - 2. powdered milk is in excess production
43. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)
burdizzo
elastrator
spermatogenesis
accessory sex glands
44. 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.
mare's estrous cycle
cryptorchid
spermatogenesis
colostrum
45. Days which have increasing daylight hours
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46. Standing to be mounted (last one able to notice); mounting other animals; social behavior-restless - gregarious - activity - vocalizing; frequent urination; mucous discharge
behavioral signs of estrus
ewe estrus cycle
Grading choice
Lutinizing Hormone in males
47. 14-19 (17) days
Dairy Cattle Gestation
normal presentation of the fetus
ewe estrus cycle
elastrator
48. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
prostaglandin
semen evaluation (BSE)
Follical Stimulating in males
49. Allows extension of penis without fibro-elastic penis
sigmoid flexure
Dairy Cattle milking schedule
hormones
effects of BST
50. Why Dairy calves are fed powdered milk.
estrous
dairy cattle pregnancy check
penis and prepuce observation (BSE)
1. more cost effective - 2. powdered milk is in excess production