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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. (FSH) causes egg to mature in females
Follical Stimulating in females
Grading choice
Follical Stimulating in males
femininity of a heifer
2. Contains and regulates the temp of the testes for sperm production
Sperm survival specs
6-8 weeks
scrotum
Lutinizing Hormone in males
3. 16-20 hours
Where livelihood is in agriculture
cow estrus
reason for seasonal breeding periods
visual evaluation (BSE)
4. 30-38 hours after estrus cycle begins
4 major reasons for culling dairy cows
polyestrous
sow ovulation
monorchid
5. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).
organs used in spermatogenesis
hormones
estrous
testis (gonads)
6. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells
Mares
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
vulva
organs used in spermatogenesis
7. Implies the amount of estrogen production
ewe's estrous cycle
femininity of a heifer
burdizzo
polyestrous
8. 1. brain function - 2. blood flow - 3. willing female
what has to happen for males for copulation to occur
dry matter and water
Dairy calves are removed from cow at birth to...
urethra
9. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase
age and castration
sperm cell
purpose of Breeding Soundness Exam (BSE) for males
sertoli cells
10. Can survive ~7 days in cow. vast majority <48 hours
urethra
penis sizes vs delivering methods
Sperm survival specs
functions of progestrone
11. 19-23 (21) days
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
testosterone
sow estrus cycle
Avg. bull specs
12. 1-3 days
sow estrus
cow ovulation
Follical Stimulating in females
seminiferous tubules
13. % of fat in milk. makes cheeses and ice cream. regulates cost of milk
behavioral signs of estrus
butterfat
mare gestation
Sperm growth rate
14. 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.
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15. Allows extension of penis without fibro-elastic penis
organs used in spermatogenesis
sigmoid flexure
Brown Swiss Cow
Sperm survival specs
16. 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)
Blood
penis and prepuce observation (BSE)
Parturition
17. 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?
Jersey Cow
1. more cost effective - 2. powdered milk is in excess production
Brown Swiss Cow
18. Duct through penis that carries sperm and urine
Dairy Cattle Gestation
urethra
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
cow ovulation
19. Not under a timeline - cow can not be sold as steak
dartos muscle
Grading choice
eminal vesicles
cervix
20. 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)
sow ovulation
Jersey Cow
dairy cattle pregnancy check
21. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.
testis (gonads)
Reasons for gestation length being affected
cow gestation
ewe ovulation
22. Check feet and legs - look for masculine traits in build such as crest and muscling
visual evaluation (BSE)
urethra
feeding a high producing dairy cow
monorchid
23. Depository for semen during insemination. where urine leaves the body
vagina
scrotal circumference (BSE)
mare estrus cycle
seminiferous tubules
24. 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.
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25. Milk is 15% ________ and 85% __________.
dry matter and water
reasons for castration
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
26. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm
mare gestation
6-8 weeks
monestrous
scrotal circumference (BSE)
27. 30-38 hours after estrus cycle begins
sow ovulation
6-8 weeks
Parturition
mastitis
28. Urinary calculi.
uterus
kidney stones also called ________ ___________ can develop in the sigmoid flexure
ewe estrus
monestrous
29. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %
Jersey Cow
Dairy calves are removed from cow at birth to...
cow estrus
castration
30. 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)
what has to happen for males for copulation to occur
dartos muscle
visual evaluation (BSE)
31. 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
sow ovulation
scrotum
ewe gestation
32. Animals which have only one estrous cycle (ex: dog - fox)
sow estrus cycle
monestrous
leydid or interstitial cells
Bull's fibro-elastic penis
33. What helps regulate spermatogenesis?
6-8 weeks
what has to happen for males for copulation to occur
testosterone
Mares
34. 24 hours before end of estrus cycle
#1 cost in production
mare ovulation
libido test (BSE)
epididymis: definition - 3 parts - 4 functions
35. Start of the reproductive tract for the female. located outside of the body
vulva
cremaster muscle
sperm cell
effects of BST
36. Scar tissue plugs up chambers of udder
libido test (BSE)
stag
stag
mastitis
37. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total
Mares
testis (gonads)
Jersey Cow
cremaster muscle
38. Front feet and head first. (except for hogs and dogs)
normal presentation of the fetus
sow gestation
testis (gonads)
penis proper
39. 30 hours after estrus begins
cow ovulation
kidney stones also called ________ ___________ can develop in the sigmoid flexure
Parturition
dartos muscle
40. Sperm is produced here
1. more cost effective - 2. powdered milk is in excess production
seminiferous tubules
elastrator
castration
41. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off
testosterone
elastrator
ewe's estrous cycle
Follical Stimulating in males
42. Important 'landmark' during palpation
sow ovulation
normal presentation of the fetus
cervix
Dairy Cattle Gestation
43. 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)
sertoli cells
functions of progestrone
vagina
prostate gland
44. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.
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45. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %
monorchid
Hormones from both the fetus and the mom.
Brown Swiss Cow
Jersey Cow
46. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders
functions of progestrone
growth lost from castration methods (knife & band)
Mares
testis (gonads)
47. When are steers and heifers weaned from bottle feeding?
cryptorchid
cow estrus
monorchid
6-8 weeks
48. Not under a timeline - cow can not be sold as steak
cervix
mastitis
cowper's gland
Grading choice
49. Milk ~305 days - dry 60 days prior to calving
Dairy Cattle milking schedule
dry matter and water
Size of cow in relation to the amount of milk produced
Dairy Cattle Gestation
50. 16-20 hours
cow estrus
cowper's gland
Sperm survival specs
Brown Swiss Cow