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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. (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
scrotal circumference (BSE)
Hard
epididymis: definition - 3 parts - 4 functions
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. ~60 days before calving
visual evaluation (BSE)
castration
prostate gland
dry-off time in dairy cattle
3. Front feet and head first. (except for hogs and dogs)
normal presentation of the fetus
retractor muscles
effects of BST
mastitis
4. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)
libido test (BSE)
accessory sex glands
femininity of a heifer
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
5. Larger the cow - more milk is produced; smaller the cow - less milk is produced
Size of cow in relation to the amount of milk produced
Sperm growth rate
elastrator
ewe's estrous cycle
6. 45-60 days after breeding; re-breed as required
sow estrus cycle
dairy cattle pregnancy check
Lutinizing Hormone in females
Culls bulls earlier (2 reasons)
7. The more stressed out the male is - the less sperm he is going to produce
#1 cost in production
Where livelihood is in agriculture
organs used in spermatogenesis
humans: stress level vs sperm
8. FEED
seasonally polyestrous
van deferens
#1 cost in production
testis (gonads)
9. 147 days
testis (gonads)
Dairy Cattle Gestation
functions of progestrone
ewe gestation
10. Important 'landmark' during palpation
Parturition
leydid or interstitial cells
retractor muscles
cervix
11. Microscopic - make sure not sterile - very few bulls are actually tested
dartos muscle
Lutinizing Hormone in males
semen evaluation (BSE)
pelvis
12. 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.
cow ovulation
seasonally polyestrous
why does the cow need fat deposits during pregnancy?
cow ovulation
13. Can survive ~7 days in cow. vast majority <48 hours
cow estrus cycle
Sperm survival specs
normal presentation of the fetus
cow estrus
14. 336 days
polyestrous
mare gestation
cremaster muscle
feeding a high producing dairy cow
15. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.
Reasons for gestation length being affected
testosterone
~1 month
eminal vesicles
16. 16-20 hours
Bull's fibro-elastic penis
cow estrus
normal presentation of the fetus
why does the cow need fat deposits during pregnancy?
17. Implies the amount of estrogen production
why does the cow need fat deposits during pregnancy?
feeding a high producing dairy cow
why does the cow need fat deposits during pregnancy?
femininity of a heifer
18. 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
semen evaluation (BSE)
Sperm growth rate
vagina
effects of BST
19. 336 days
mare gestation
6-8 weeks
epididymis: definition - 3 parts - 4 functions
Where livelihood is in agriculture
20. 24 hours before end of estrus cycle
Parturition
accessory sex glands
mare ovulation
elastrator
21. Animals which have many estrous periods per year (ex: cow - sow)
polyestrous
mare ovulation
colostrum
cowper's gland
22. 1-2 days
ewe estrus
testis (gonads)
penis sizes vs delivering methods
cowper's gland
23. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat
testis (gonads)
colostrum
Holstein Cow
kidney stones also called ________ ___________ can develop in the sigmoid flexure
24. Allows extension of penis without fibro-elastic penis
penis sizes vs delivering methods
sigmoid flexure
normal presentation of the fetus
Dairy Cattle milking schedule
25. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market
pelvis
kidney stones also called ________ ___________ can develop in the sigmoid flexure
reasons for castration
Dairy Cattle Gestation
26. 14-19 (17) days
testosterone
rectal palpation (BSE)
ewe estrus cycle
effects of BST
27. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation
scrotum
things to check for in a breeding soundness exam (BSE)
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
Lutinizing Hormone in females
28. Parturition is controlled by...
mare gestation
~1 month
Hormones from both the fetus and the mom.
seasonally polyestrous
29. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
Mares
estrous
van deferens
30. 4-6 days
Jersey Cow
mare estrus
ewe estrus
Lutinizing Hormone in females
31. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm
dry matter and water
retractor muscles
Holstein Cow
scrotal circumference (BSE)
32. Failure to have one testis (gonad) to descend
monorchid
effects of BST
prostate gland
Holstein Cow
33. 45-60 days after breeding; re-breed as required
dairy cattle pregnancy check
cryptorchid
cow estrus
ewe's estrous cycle
34. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.
effects of estrogen
monorchid
sow ovulation
estrous
35. 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)
burdizzo
humans: stress level vs sperm
Lutinizing Hormone in females
36. 114 days
hypothalamus and pituitary gland
penis proper
sow gestation
cow estrus cycle
37. FEED
#1 cost in production
dartos muscle
monorchid
cowper's gland
38. 147 days
cow ovulation
ewe gestation
Hormones from both the fetus and the mom.
seasonally polyestrous
39. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells
what has to happen for males for copulation to occur
Mares
things to check for in a breeding soundness exam (BSE)
organs used in spermatogenesis
40. Actual heat cycle (period)
uterus
dry-off time in dairy cattle
estrus
mare estrus cycle
41. Superior genes are _______ to multiply
Mares
Hard
cow estrus cycle
rectal palpation (BSE)
42. 283 days
Culls bulls earlier (2 reasons)
polyestrous
cow gestation
uterus
43. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.
pelvis
functions of progestrone
vulva
estrous
44. Contains and regulates the temp of the testes for sperm production
scrotum
Hormones from both the fetus and the mom.
6-8 weeks
scrotal circumference (BSE)
45. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation
effects of BST
things to check for in a breeding soundness exam (BSE)
cryptorchid
colostrum
46. What makes the milk flow through the mammary glands?
what has to happen for males for copulation to occur
kidney stones also called ________ ___________ can develop in the sigmoid flexure
effects of estrogen
Blood
47. 283 days
Mares
cow gestation
accessory sex glands
mare estrus
48. Duct through penis that carries sperm and urine
cow ovulation
Dairy calves are removed from cow at birth to...
sperm cell
urethra
49. Why Dairy calves are fed powdered milk.
Holstein Cow
epididymis: definition - 3 parts - 4 functions
1. more cost effective - 2. powdered milk is in excess production
Brown Swiss Cow
50. 1-3 days
sow estrus
penis proper
urethra
seasonally polyestrous