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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. Look for infection - split - and rupture of the penis
monestrous
estrous
why does the cow need fat deposits during pregnancy?
penis and prepuce observation (BSE)
2. Front feet and head first. (except for hogs and dogs)
hypothalamus and pituitary gland
libido test (BSE)
sow estrus cycle
normal presentation of the fetus
3. 24 hours before end of estrus cycle
hypothalamus and pituitary gland
sperm cell
mare ovulation
accessory sex glands
4. What helps regulate spermatogenesis?
rectal palpation (BSE)
mare ovulation
testosterone
ewe estrus
5. What about the sperm for a bull which has been castrated but still has testicles?
Bull's fibro-elastic penis
sperm cell
what has to happen for males for copulation to occur
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
6. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total
testis (gonads)
reasons for castration
butterfat
cow ovulation
7. 26 hours after estrus begins
sow estrus
cow estrus
sow ovulation
ewe ovulation
8. 45-60 days after breeding; re-breed as required
dairy cattle pregnancy check
6-8 weeks
sertoli cells
van deferens
9. Animals which have many estrous periods per year (ex: cow - sow)
testis (gonads)
Culls bulls earlier (2 reasons)
4 major reasons for culling dairy cows
polyestrous
10. Days which have decreasing daylight hours
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11. 283 days
monestrous
Hormones from both the fetus and the mom.
hypothalamus and pituitary gland
cow gestation
12. Why Dairy calves are fed powdered milk.
sigmoid flexure
colostrum
ewe estrus
1. more cost effective - 2. powdered milk is in excess production
13. What makes the milk flow through the mammary glands?
sow gestation
Blood
age and castration
Follical Stimulating in females
14. % of fat in milk. makes cheeses and ice cream. regulates cost of milk
butterfat
growth lost from castration methods (knife & band)
testosterone
Sperm growth rate
15. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)
Follical Stimulating in males
Lutinizing Hormone in females
prostate gland
effects of estrogen
16. 45-60 days after breeding; re-breed as required
urethra
Dairy Cattle milking schedule
dairy cattle pregnancy check
libido test (BSE)
17. 114 days
purpose of Breeding Soundness Exam (BSE) for males
sow gestation
Blood
sow ovulation
18. 1-2 days
estrous
ewe estrus
mare ovulation
eminal vesicles
19. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells
estrous
Blood
organs used in spermatogenesis
Lutinizing Hormone in males
20. 30-38 hours after estrus cycle begins
mare ovulation
effects of BST
sow ovulation
estrus
21. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat
4 major reasons for culling dairy cows
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
mare estrus cycle
Holstein Cow
22. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation
things to check for in a breeding soundness exam (BSE)
Dairy Cattle Gestation
cow ovulation
elastrator
23. 26 hours after estrus begins
ewe ovulation
humans: stress level vs sperm
effects of estrogen
ewe estrus
24. Depository for semen during insemination. where urine leaves the body
hormones
vagina
mare ovulation
Brown Swiss Cow
25. 10-37 (21) days
retractor muscles
reason for seasonal breeding periods
mare estrus cycle
monestrous
26. When are dairy cattle dehorned?
visual evaluation (BSE)
ewe estrus cycle
butterfat
~1 month
27. 19-23 (21) days
Hormones from both the fetus and the mom.
Hard
sow estrus cycle
spermatogenesis
28. 1. brain function - 2. blood flow - 3. willing female
what has to happen for males for copulation to occur
purpose of Breeding Soundness Exam (BSE) for males
Size of cow in relation to the amount of milk produced
Bull's fibro-elastic penis
29. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
stag
Bull's fibro-elastic penis
Jersey Cow
30. Castration tool which clamps down on the vans deferens. causes the sperm to not reach the penis to be ejaculated
sow ovulation
femininity of a heifer
Hard
burdizzo
31. Start of the reproductive tract for the female. located outside of the body
vulva
elastrator
ewe gestation
organs used in spermatogenesis
32. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers
Where livelihood is in agriculture
oviducts
seminiferous tubules
mare estrus
33. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.
retractor muscles
van deferens
butterfat
ewe's estrous cycle
34. Important 'landmark' during palpation
cervix
cow gestation
functions of progestrone
Hormones from both the fetus and the mom.
35. 19-23 (21) days
libido test (BSE)
Blood
seminiferous tubules
cow estrus cycle
36. Castration tool which clamps down on the vans deferens. causes the sperm to not reach the penis to be ejaculated
effects of BST
reason for seasonal breeding periods
cremaster muscle
burdizzo
37. When are steers and heifers weaned from bottle feeding?
Size of cow in relation to the amount of milk produced
seasonally polyestrous
6-8 weeks
hormones
38. Look for infection - split - and rupture of the penis
Sperm growth rate
urethra
mare's estrous cycle
penis and prepuce observation (BSE)
39. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm
Size of cow in relation to the amount of milk produced
Where livelihood is in agriculture
scrotal circumference (BSE)
sow gestation
40. Why does estrus happen before ovulation?
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
organs used in spermatogenesis
prostate gland
Dairy Cattle milking schedule
41. Produce testosterone. located between the seminiferous tubules
1. more cost effective - 2. powdered milk is in excess production
leydid or interstitial cells
uterus
van deferens
42. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg
Avg. bull specs
testosterone
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
sperm cell
43. 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
effects of BST
Lutinizing Hormone in males
things to check for in a breeding soundness exam (BSE)
Dairy calves are removed from cow at birth to...
44. ~305 days (altough often longer due to breeding difficulties)
reasons for castration
Dairy Cattle Lactation (standard)
femininity of a heifer
age and castration
45. Sperm production
spermatogenesis
monestrous
humans: stress level vs sperm
dairy cattle pregnancy check
46. 10-37 (21) days
mare estrus cycle
butterfat
oviducts
dry-off time in dairy cattle
47. Implies the amount of estrogen production
hormones
scrotum
femininity of a heifer
Dairy Cattle milking schedule
48. Can survive ~7 days in cow. vast majority <48 hours
Sperm survival specs
monestrous
mare ovulation
functions of progestrone
49. 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.
Blood
colostrum
Follical Stimulating in females
humans: stress level vs sperm
50. Birthing process (termination of gestation)
6-8 weeks
Parturition
Lutinizing Hormone in males
sow estrus