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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. 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.
why does the cow need fat deposits during pregnancy?
mare's estrous cycle
cremaster muscle
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
2. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING
reason for seasonal breeding periods
sow gestation
ewe ovulation
Sperm growth rate
3. 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.
mastitis
uterus
cow gestation
testis (gonads)
4. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has
ewe estrus
rectal palpation (BSE)
cow estrus
mastitis
5. Check feet and legs - look for masculine traits in build such as crest and muscling
visual evaluation (BSE)
ewe estrus cycle
cow estrus
Size of cow in relation to the amount of milk produced
6. Parturition is controlled by...
Hormones from both the fetus and the mom.
mastitis
#1 cost in production
penis and prepuce observation (BSE)
7. 24 hours before end of estrus cycle
seasonally polyestrous
Follical Stimulating in females
spermatogenesis
mare ovulation
8. FEED
seminiferous tubules
Dairy Cattle Lactation (standard)
libido test (BSE)
#1 cost in production
9. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed
Lutinizing Hormone in males
effects of estrogen
Avg. bull specs
spermatogenesis
10. 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
Follical Stimulating in females
growth lost from castration methods (knife & band)
estrous
effects of BST
11. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).
ewe's estrous cycle
hormones
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
sperm cell
12. Birthing process (termination of gestation)
visual evaluation (BSE)
normal presentation of the fetus
Parturition
pelvis
13. 19-23 (21) days
vagina
1. more cost effective - 2. powdered milk is in excess production
sow estrus cycle
cow estrus cycle
14. Urinary calculi.
purpose of Breeding Soundness Exam (BSE) for males
Sperm growth rate
Dairy Cattle milking schedule
kidney stones also called ________ ___________ can develop in the sigmoid flexure
15. Can survive ~7 days in cow. vast majority <48 hours
feeding a high producing dairy cow
#1 cost in production
Sperm survival specs
hypothalamus and pituitary gland
16. 1-3 days
dartos muscle
sow estrus
Follical Stimulating in males
mare gestation
17. 1. brain function - 2. blood flow - 3. willing female
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
ewe estrus
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
what has to happen for males for copulation to occur
18. What makes the milk flow through the mammary glands?
estrus
ewe gestation
Blood
prostaglandin
19. Help to signal hormone levels which we need both in the brain right next to each other.
Avg. bull specs
Bull's fibro-elastic penis
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
hypothalamus and pituitary gland
20. (LH) stimulates the Leydig cells to produce testosterone
sow estrus cycle
kidney stones also called ________ ___________ can develop in the sigmoid flexure
Reasons for gestation length being affected
Lutinizing Hormone in males
21. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm
scrotal circumference (BSE)
Avg. bull specs
butterfat
castration
22. 30-38 hours after estrus cycle begins
sow ovulation
hormones
sow gestation
Sperm survival specs
23. 4-6 days
uterus
dry-off time in dairy cattle
mare estrus
burdizzo
24. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %
functions of progestrone
Sperm survival specs
burdizzo
Jersey Cow
25. 10-37 (21) days
mare estrus cycle
epididymis: definition - 3 parts - 4 functions
sigmoid flexure
effects of BST
26. Male on one pin and female on other side
libido test (BSE)
Jersey Cow
vulva
mare estrus
27. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells
cow estrus cycle
mastitis
organs used in spermatogenesis
butterfat
28. Prevent the cow from getting an infection from the calve
reason for seasonal breeding periods
cervix
humans: stress level vs sperm
Dairy calves are removed from cow at birth to...
29. Scar tissue plugs up chambers of udder
sperm cell
mastitis
monorchid
sow estrus cycle
30. 265-285 days
retractor muscles
visual evaluation (BSE)
Dairy Cattle Gestation
mare estrus cycle
31. 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
polyestrous
sigmoid flexure
Holstein Cow
functions of progestrone
32. Failure to have one testis (gonad) to descend
monorchid
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
visual evaluation (BSE)
elastrator
33. 114 days
why does the cow need fat deposits during pregnancy?
Mares
sow gestation
Bull's fibro-elastic penis
34. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.
retractor muscles
prostate gland
colostrum
libido test (BSE)
35. % of fat in milk. makes cheeses and ice cream. regulates cost of milk
growth lost from castration methods (knife & band)
organs used in spermatogenesis
visual evaluation (BSE)
butterfat
36. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)
mare estrus
seasonally polyestrous
Size of cow in relation to the amount of milk produced
what has to happen for males for copulation to occur
37. When are steers and heifers weaned from bottle feeding?
why does the cow need fat deposits during pregnancy?
vulva
vagina
6-8 weeks
38. What about the sperm for a bull which has been castrated but still has testicles?
hypothalamus and pituitary gland
scrotum
cervix
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
39. 10-37 (21) days
ewe's estrous cycle
mare estrus cycle
cow ovulation
growth lost from castration methods (knife & band)
40. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation
retractor muscles
things to check for in a breeding soundness exam (BSE)
mare ovulation
sertoli cells
41. 1-2 days
pelvis
ewe ovulation
reasons for castration
ewe estrus
42. Why does estrus happen before ovulation?
Holstein Cow
dry matter and water
sertoli cells
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
43. Check feet and legs - look for masculine traits in build such as crest and muscling
Hormones from both the fetus and the mom.
van deferens
cremaster muscle
visual evaluation (BSE)
44. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has
seasonally polyestrous
dry-off time in dairy cattle
mare gestation
rectal palpation (BSE)
45. Provide nourishment for the developing sperm
castration
Lutinizing Hormone in females
sertoli cells
feeding a high producing dairy cow
46. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.
estrus
what has to happen for males for copulation to occur
sow estrus
effects of estrogen
47. Milk is 15% ________ and 85% __________.
Follical Stimulating in females
normal presentation of the fetus
organs used in spermatogenesis
dry matter and water
48. Produce testosterone. located between the seminiferous tubules
accessory sex glands
spermatogenesis
cremaster muscle
leydid or interstitial cells
49. 147 days
testis (gonads)
penis sizes vs delivering methods
ewe gestation
Where livelihood is in agriculture
50. 336 days
libido test (BSE)
mare gestation
hormones
organs used in spermatogenesis