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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. To remove/separate testicles from animal's body before animal reaches puberty
femininity of a heifer
castration
ewe's estrous cycle
6-8 weeks
2. 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)
sow estrus cycle
mare ovulation
effects of BST
3. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat
Hormones from both the fetus and the mom.
Sperm growth rate
Holstein Cow
Mares
4. When are dairy cattle dehorned?
penis proper
~1 month
sow ovulation
Where livelihood is in agriculture
5. 283 days
Holstein Cow
cow gestation
dartos muscle
effects of BST
6. Help to signal hormone levels which we need both in the brain right next to each other.
hypothalamus and pituitary gland
Lutinizing Hormone in females
elastrator
normal presentation of the fetus
7. 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.
uterus
epididymis: definition - 3 parts - 4 functions
Size of cow in relation to the amount of milk produced
humans: stress level vs sperm
8. 45-60 days after breeding; re-breed as required
cow estrus
van deferens
ewe estrus
dairy cattle pregnancy check
9. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)
accessory sex glands
pelvis
humans: stress level vs sperm
eminal vesicles
10. 19-23 (21) days
prostaglandin
sow estrus cycle
Parturition
cow ovulation
11. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.
#1 cost in production
estrous
penis sizes vs delivering methods
sertoli cells
12. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm
Parturition
Follical Stimulating in males
effects of estrogen
urethra
13. FEED
sertoli cells
#1 cost in production
spermatogenesis
Grading choice
14. (male) pushes the testes upward toward the body for warmth or protection
sow gestation
Dairy Cattle Gestation
dartos muscle
sow ovulation
15. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.
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16. The more stressed out the male is - the less sperm he is going to produce
Mares
retractor muscles
femininity of a heifer
humans: stress level vs sperm
17. 114 days
seminiferous tubules
sow ovulation
sow gestation
pelvis
18. 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.
cryptorchid
accessory sex glands
penis sizes vs delivering methods
why does the cow need fat deposits during pregnancy?
19. Produce testosterone. located between the seminiferous tubules
effects of estrogen
seminiferous tubules
leydid or interstitial cells
eminal vesicles
20. 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)
monestrous
prostate gland
organs used in spermatogenesis
Hard
21. 19-23 (21) days
Lutinizing Hormone in males
cow estrus cycle
seasonally polyestrous
sow estrus cycle
22. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.
ewe's estrous cycle
uterus
pelvis
accessory sex glands
23. Sperm production
cervix
6-8 weeks
dry-off time in dairy cattle
spermatogenesis
24. Superior genes are _______ to multiply
mare estrus
urethra
what has to happen for males for copulation to occur
Hard
25. 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)
things to check for in a breeding soundness exam (BSE)
prostate gland
Sperm growth rate
ewe ovulation
26. 24 hours before end of estrus cycle
effects of BST
age and castration
sigmoid flexure
mare ovulation
27. 2 month growth cycle. stored in the epididymis of the bull
Bull's fibro-elastic penis
Sperm survival specs
Dairy calves are removed from cow at birth to...
Sperm growth rate
28. 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.
Lutinizing Hormone in males
Sperm survival specs
leydid or interstitial cells
Culls bulls earlier (2 reasons)
29. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood
epididymis: definition - 3 parts - 4 functions
sow estrus
penis proper
Culls bulls earlier (2 reasons)
30. Milk is 15% ________ and 85% __________.
scrotum
4 major reasons for culling dairy cows
dry matter and water
feeding a high producing dairy cow
31. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells
Sperm growth rate
organs used in spermatogenesis
dry-off time in dairy cattle
Reasons for gestation length being affected
32. Front feet and head first. (except for hogs and dogs)
cow ovulation
humans: stress level vs sperm
estrus
normal presentation of the fetus
33. Allows extension of penis without fibro-elastic penis
sigmoid flexure
4 major reasons for culling dairy cows
cow estrus
Bull's fibro-elastic penis
34. Important 'landmark' during palpation
stag
cervix
#1 cost in production
seminiferous tubules
35. 30 hours after estrus begins
Follical Stimulating in males
sertoli cells
cow ovulation
seminiferous tubules
36. Why Dairy calves are fed powdered milk.
Dairy Cattle Gestation
Parturition
hormones
1. more cost effective - 2. powdered milk is in excess production
37. Male on one pin and female on other side
leydid or interstitial cells
6-8 weeks
castration
libido test (BSE)
38. Why does estrus happen before ovulation?
burdizzo
ewe estrus cycle
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
cow ovulation
39. 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
mare estrus cycle
functions of progestrone
vulva
why does the cow need fat deposits during pregnancy?
40. Animals which have only one estrous cycle (ex: dog - fox)
Hormones from both the fetus and the mom.
things to check for in a breeding soundness exam (BSE)
monestrous
visual evaluation (BSE)
41. Actual heat cycle (period)
penis proper
ewe gestation
4 major reasons for culling dairy cows
estrus
42. (male) pushes the testes outward toward the legs for a cool-down off of the body
Dairy Cattle Lactation (standard)
organs used in spermatogenesis
Bull's fibro-elastic penis
cremaster muscle
43. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)
prostaglandin
elastrator
4 major reasons for culling dairy cows
penis proper
44. Check feet and legs - look for masculine traits in build such as crest and muscling
Holstein Cow
hypothalamus and pituitary gland
penis and prepuce observation (BSE)
visual evaluation (BSE)
45. Scar tissue plugs up chambers of udder
polyestrous
elastrator
mastitis
scrotal circumference (BSE)
46. (male) pushes the testes upward toward the body for warmth or protection
castration
cow estrus
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
dartos muscle
47. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm
Dairy Cattle Gestation
scrotal circumference (BSE)
ewe ovulation
Follical Stimulating in males
48. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.
pelvis
Follical Stimulating in males
cervix
dry-off time in dairy cattle
49. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.
effects of estrogen
mastitis
sigmoid flexure
oviducts
50. Superior genes are _______ to multiply
cow estrus
Lutinizing Hormone in females
cow estrus cycle
Hard