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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. (LH) stimulates the Leydig cells to produce testosterone
femininity of a heifer
Lutinizing Hormone in males
dartos muscle
visual evaluation (BSE)
2. (LH) causes female's egg to break (her period)
Lutinizing Hormone in females
cow gestation
seasonally polyestrous
penis sizes vs delivering methods
3. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase
age and castration
visual evaluation (BSE)
dry-off time in dairy cattle
scrotal circumference (BSE)
4. 24 hours before end of estrus cycle
Sperm survival specs
penis sizes vs delivering methods
mare ovulation
what has to happen for males for copulation to occur
5. Scar tissue plugs up chambers of udder
Avg. bull specs
mastitis
Bull's fibro-elastic penis
castration
6. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.
sperm cell
prostaglandin
semen evaluation (BSE)
penis sizes vs delivering methods
7. Milk is 15% ________ and 85% __________.
dry matter and water
#1 cost in production
what has to happen for males for copulation to occur
effects of estrogen
8. Parturition is controlled by...
Hormones from both the fetus and the mom.
estrus
reason for seasonal breeding periods
Reasons for gestation length being affected
9. 283 days
cow gestation
spermatogenesis
Reasons for gestation length being affected
mare ovulation
10. Male on one pin and female on other side
Dairy Cattle Lactation (standard)
Sperm survival specs
Culls bulls earlier (2 reasons)
libido test (BSE)
11. Knife-loose ~1wk of growth. band-loose ~2wks of growth.
cow ovulation
cowper's gland
growth lost from castration methods (knife & band)
castration
12. Birthing process (termination of gestation)
sow ovulation
Parturition
Holstein Cow
Hormones from both the fetus and the mom.
13. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.
oviducts
growth lost from castration methods (knife & band)
burdizzo
polyestrous
14. 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
testosterone
functions of progestrone
sigmoid flexure
Sperm growth rate
15. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)
vagina
cow estrus cycle
accessory sex glands
1. more cost effective - 2. powdered milk is in excess production
16. When are steers and heifers weaned from bottle feeding?
6-8 weeks
seasonally polyestrous
epididymis: definition - 3 parts - 4 functions
purpose of Breeding Soundness Exam (BSE) for males
17. (FSH) causes egg to mature in females
castration
Follical Stimulating in females
butterfat
growth lost from castration methods (knife & band)
18. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).
Avg. bull specs
hormones
prostate gland
growth lost from castration methods (knife & band)
19. Duct through penis that carries sperm and urine
Parturition
urethra
reason for seasonal breeding periods
uterus
20. Why does estrus happen before ovulation?
functions of progestrone
vulva
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
Bull's fibro-elastic penis
21. Sperm production
4 major reasons for culling dairy cows
spermatogenesis
ewe estrus
mare estrus cycle
22. (switzerland) 2nd in size and milk production - most muscle -
sigmoid flexure
Brown Swiss Cow
mare estrus
feeding a high producing dairy cow
23. 14-19 (17) days
seasonally polyestrous
normal presentation of the fetus
mare's estrous cycle
ewe estrus cycle
24. 2 month growth cycle. stored in the epididymis of the bull
monestrous
Size of cow in relation to the amount of milk produced
Sperm growth rate
mare ovulation
25. Depository for semen during insemination. where urine leaves the body
vagina
6-8 weeks
what has to happen for males for copulation to occur
seasonally polyestrous
26. ~305 days (altough often longer due to breeding difficulties)
1. more cost effective - 2. powdered milk is in excess production
Dairy Cattle Lactation (standard)
mastitis
things to check for in a breeding soundness exam (BSE)
27. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total
Follical Stimulating in males
things to check for in a breeding soundness exam (BSE)
testis (gonads)
functions of progestrone
28. 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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29. Failure to have both testis (gonads) descend
sow gestation
Lutinizing Hormone in males
vulva
cryptorchid
30. Way to know everything is alright with the breeding male
1. more cost effective - 2. powdered milk is in excess production
purpose of Breeding Soundness Exam (BSE) for males
dry matter and water
ewe ovulation
31. Sperm is produced here
ewe estrus
age and castration
seminiferous tubules
sow gestation
32. Can survive ~7 days in cow. vast majority <48 hours
Dairy Cattle Lactation (standard)
Sperm survival specs
vagina
purpose of Breeding Soundness Exam (BSE) for males
33. Animal which has been castrated after puberty
semen evaluation (BSE)
Holstein Cow
cervix
stag
34. Animals which have many estrous periods per year (ex: cow - sow)
polyestrous
ewe estrus
Brown Swiss Cow
6-8 weeks
35. 30 hours after estrus begins
sow gestation
cow ovulation
Hard
scrotum
36. Look for infection - split - and rupture of the penis
Hard
penis and prepuce observation (BSE)
mare's estrous cycle
Dairy Cattle Gestation
37. To remove/separate testicles from animal's body before animal reaches puberty
castration
dry-off time in dairy cattle
mare's estrous cycle
hormones
38. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood
Hard
penis proper
dairy cattle pregnancy check
hormones
39. To remove/separate testicles from animal's body before animal reaches puberty
Hard
cryptorchid
castration
Follical Stimulating in females
40. 45-60 days after breeding; re-breed as required
prostaglandin
visual evaluation (BSE)
purpose of Breeding Soundness Exam (BSE) for males
dairy cattle pregnancy check
41. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract
elastrator
sow estrus cycle
epididymis: definition - 3 parts - 4 functions
eminal vesicles
42. Days which have decreasing daylight hours
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43. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.
Hormones from both the fetus and the mom.
testis (gonads)
Reasons for gestation length being affected
Grading choice
44. Why Dairy calves are fed powdered milk.
growth lost from castration methods (knife & band)
castration
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
1. more cost effective - 2. powdered milk is in excess production
45. (male) pushes the testes upward toward the body for warmth or protection
#1 cost in production
~1 month
elastrator
dartos muscle
46. The more stressed out the male is - the less sperm he is going to produce
humans: stress level vs sperm
mare estrus cycle
Bull's fibro-elastic penis
Dairy calves are removed from cow at birth to...
47. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm
Follical Stimulating in females
things to check for in a breeding soundness exam (BSE)
Follical Stimulating in males
prostate gland
48. Luteolysis happens because of the ____________ hormone
cowper's gland
prostaglandin
ewe estrus
effects of estrogen
49. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.
Avg. bull specs
van deferens
ewe's estrous cycle
rectal palpation (BSE)
50. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).
pelvis
spermatogenesis
things to check for in a breeding soundness exam (BSE)
hormones