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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. Failure to have both testis (gonads) descend
cryptorchid
scrotal circumference (BSE)
Sperm survival specs
dairy cattle pregnancy check
2. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat
Holstein Cow
Parturition
Grading choice
oviducts
3. 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
visual evaluation (BSE)
sow gestation
scrotum
effects of BST
4. What makes the milk flow through the mammary glands?
testis (gonads)
effects of BST
Blood
cow estrus
5. Implies the amount of estrogen production
femininity of a heifer
seminiferous tubules
Lutinizing Hormone in males
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
6. 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
kidney stones also called ________ ___________ can develop in the sigmoid flexure
penis sizes vs delivering methods
feeding a high producing dairy cow
functions of progestrone
7. Sperm is produced here
polyestrous
Bull's fibro-elastic penis
Dairy Cattle Gestation
seminiferous tubules
8. Contains and regulates the temp of the testes for sperm production
sertoli cells
scrotum
what has to happen for males for copulation to occur
Where livelihood is in agriculture
9. 45-60 days after breeding; re-breed as required
dairy cattle pregnancy check
humans: stress level vs sperm
ewe's estrous cycle
dartos muscle
10. 10-37 (21) days
normal presentation of the fetus
uterus
behavioral signs of estrus
mare estrus cycle
11. (LH) causes female's egg to break (her period)
ewe estrus
reasons for castration
Lutinizing Hormone in females
Dairy Cattle Gestation
12. 265-285 days
behavioral signs of estrus
Dairy Cattle Gestation
uterus
mare estrus
13. Allows extension of penis without fibro-elastic penis
Dairy Cattle milking schedule
sigmoid flexure
hypothalamus and pituitary gland
Lutinizing Hormone in males
14. 147 days
Hormones from both the fetus and the mom.
Follical Stimulating in males
ewe gestation
Reasons for gestation length being affected
15. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)
accessory sex glands
testis (gonads)
ewe's estrous cycle
cremaster muscle
16. 114 days
sow gestation
reason for seasonal breeding periods
dartos muscle
Sperm growth rate
17. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract
ewe ovulation
eminal vesicles
stag
Size of cow in relation to the amount of milk produced
18. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING
mare's estrous cycle
reason for seasonal breeding periods
estrus
Lutinizing Hormone in females
19. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).
seasonally polyestrous
things to check for in a breeding soundness exam (BSE)
hormones
butterfat
20. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers
Follical Stimulating in males
Where livelihood is in agriculture
effects of estrogen
scrotum
21. Superior genes are _______ to multiply
mare estrus
spermatogenesis
effects of estrogen
Hard
22. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood
ewe estrus cycle
normal presentation of the fetus
penis proper
Follical Stimulating in males
23. (FSH) causes egg to mature in females
prostaglandin
cow ovulation
vulva
Follical Stimulating in females
24. 24 hours before end of estrus cycle
Sperm survival specs
Hard
van deferens
mare ovulation
25. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.
mare gestation
sertoli cells
mare gestation
effects of estrogen
26. Urinary calculi.
functions of progestrone
kidney stones also called ________ ___________ can develop in the sigmoid flexure
testis (gonads)
polyestrous
27. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.
28. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed
sow estrus
stag
Avg. bull specs
Sperm survival specs
29. When are dairy cattle dehorned?
~1 month
Sperm growth rate
semen evaluation (BSE)
what has to happen for males for copulation to occur
30. Help to signal hormone levels which we need both in the brain right next to each other.
femininity of a heifer
Size of cow in relation to the amount of milk produced
age and castration
hypothalamus and pituitary gland
31. 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.
monorchid
mare estrus cycle
Culls bulls earlier (2 reasons)
scrotum
32. Milk is 15% ________ and 85% __________.
rectal palpation (BSE)
feeding a high producing dairy cow
rectal palpation (BSE)
dry matter and water
33. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has
cremaster muscle
scrotum
rectal palpation (BSE)
Dairy Cattle Gestation
34. 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)
sigmoid flexure
hypothalamus and pituitary gland
feeding a high producing dairy cow
Size of cow in relation to the amount of milk produced
35. % of fat in milk. makes cheeses and ice cream. regulates cost of milk
butterfat
feeding a high producing dairy cow
sertoli cells
Culls bulls earlier (2 reasons)
36. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.
Culls bulls earlier (2 reasons)
Blood
Reasons for gestation length being affected
cow gestation
37. To remove/separate testicles from animal's body before animal reaches puberty
castration
sigmoid flexure
kidney stones also called ________ ___________ can develop in the sigmoid flexure
elastrator
38. 30 hours after estrus begins
butterfat
cow ovulation
feeding a high producing dairy cow
behavioral signs of estrus
39. Produce testosterone. located between the seminiferous tubules
leydid or interstitial cells
vagina
ewe gestation
prostaglandin
40. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells
mare ovulation
Where livelihood is in agriculture
Grading choice
organs used in spermatogenesis
41. Depository for semen during insemination. where urine leaves the body
cow estrus
ewe estrus
vagina
Culls bulls earlier (2 reasons)
42. 283 days
functions of progestrone
mare gestation
cow estrus
cow gestation
43. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total
why does the cow need fat deposits during pregnancy?
Where livelihood is in agriculture
eminal vesicles
testis (gonads)
44. Milk ~305 days - dry 60 days prior to calving
Dairy Cattle milking schedule
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
dry matter and water
45. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells
sow estrus cycle
vulva
Dairy Cattle Gestation
organs used in spermatogenesis
46. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has
estrous
Mares
feeding a high producing dairy cow
rectal palpation (BSE)
47. 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.
48. Microscopic - make sure not sterile - very few bulls are actually tested
Jersey Cow
semen evaluation (BSE)
Sperm survival specs
testis (gonads)
49. Knife-loose ~1wk of growth. band-loose ~2wks of growth.
Blood
Mares
sperm cell
growth lost from castration methods (knife & band)
50. Front feet and head first. (except for hogs and dogs)
cremaster muscle
cow gestation
normal presentation of the fetus
Grading choice