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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. 1-2 days
monestrous
reasons for castration
normal presentation of the fetus
ewe estrus
2. 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.
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
Grading choice
femininity of a heifer
Culls bulls earlier (2 reasons)
3. When are steers and heifers weaned from bottle feeding?
prostaglandin
functions of progestrone
6-8 weeks
cryptorchid
4. 14-19 (17) days
ewe estrus cycle
dartos muscle
spermatogenesis
reasons for castration
5. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)
Dairy Cattle Lactation (standard)
6-8 weeks
estrous
prostaglandin
6. Milk is 15% ________ and 85% __________.
dry matter and water
accessory sex glands
vagina
visual evaluation (BSE)
7. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).
Bull's fibro-elastic penis
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
hormones
Brown Swiss Cow
8. Larger the cow - more milk is produced; smaller the cow - less milk is produced
Avg. bull specs
eminal vesicles
ewe's estrous cycle
Size of cow in relation to the amount of milk produced
9. 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.
10. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders
Follical Stimulating in females
Mares
Follical Stimulating in females
colostrum
11. Allows extension of penis without fibro-elastic penis
Reasons for gestation length being affected
sigmoid flexure
ewe gestation
behavioral signs of estrus
12. Produce testosterone. located between the seminiferous tubules
leydid or interstitial cells
ewe estrus cycle
uterus
Culls bulls earlier (2 reasons)
13. Microscopic - make sure not sterile - very few bulls are actually tested
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
mare's estrous cycle
dry matter and water
semen evaluation (BSE)
14. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.
15. 30 hours after estrus begins
vulva
cow ovulation
sow estrus
penis proper
16. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING
hormones
Where livelihood is in agriculture
reason for seasonal breeding periods
Size of cow in relation to the amount of milk produced
17. The more stressed out the male is - the less sperm he is going to produce
Holstein Cow
estrous
Parturition
humans: stress level vs sperm
18. 283 days
scrotum
cow gestation
colostrum
sow estrus cycle
19. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has
semen evaluation (BSE)
rectal palpation (BSE)
cryptorchid
monorchid
20. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation
normal presentation of the fetus
things to check for in a breeding soundness exam (BSE)
dairy cattle pregnancy check
stag
21. 26 hours after estrus begins
Holstein Cow
ewe ovulation
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
ewe estrus cycle
22. 30-38 hours after estrus cycle begins
pelvis
sow ovulation
cow gestation
penis proper
23. 114 days
sow gestation
testis (gonads)
sow ovulation
stag
24. Luteolysis happens because of the ____________ hormone
cow ovulation
penis sizes vs delivering methods
prostaglandin
sigmoid flexure
25. 24 hours before end of estrus cycle
mare ovulation
Reasons for gestation length being affected
Dairy calves are removed from cow at birth to...
cremaster muscle
26. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells
organs used in spermatogenesis
Grading choice
sow estrus cycle
Grading choice
27. Way to know everything is alright with the breeding male
Follical Stimulating in males
age and castration
purpose of Breeding Soundness Exam (BSE) for males
butterfat
28. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has
reasons for castration
normal presentation of the fetus
rectal palpation (BSE)
humans: stress level vs sperm
29. (switzerland) 2nd in size and milk production - most muscle -
Dairy calves are removed from cow at birth to...
Brown Swiss Cow
monestrous
spermatogenesis
30. Why does estrus happen before ovulation?
spermatogenesis
Dairy Cattle Gestation
6-8 weeks
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
31. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract
eminal vesicles
Holstein Cow
penis sizes vs delivering methods
cryptorchid
32. 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)
penis and prepuce observation (BSE)
ewe gestation
feeding a high producing dairy cow
Follical Stimulating in females
33. Why Dairy calves are fed powdered milk.
1. more cost effective - 2. powdered milk is in excess production
visual evaluation (BSE)
Dairy calves are removed from cow at birth to...
testis (gonads)
34. (FSH) causes egg to mature in females
ewe gestation
Holstein Cow
Follical Stimulating in females
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
35. 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?
ewe gestation
retractor muscles
Brown Swiss Cow
36. FEED
testis (gonads)
vulva
epididymis: definition - 3 parts - 4 functions
#1 cost in production
37. Microscopic - make sure not sterile - very few bulls are actually tested
cryptorchid
pelvis
1. more cost effective - 2. powdered milk is in excess production
semen evaluation (BSE)
38. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm
why does the cow need fat deposits during pregnancy?
scrotal circumference (BSE)
Reasons for gestation length being affected
stag
39. Superior genes are _______ to multiply
Bull's fibro-elastic penis
Hard
what has to happen for males for copulation to occur
spermatogenesis
40. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.
what has to happen for males for copulation to occur
cryptorchid
retractor muscles
spermatogenesis
41. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total
testis (gonads)
ewe estrus cycle
dartos muscle
purpose of Breeding Soundness Exam (BSE) for males
42. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood
cremaster muscle
effects of estrogen
penis and prepuce observation (BSE)
penis proper
43. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off
Holstein Cow
elastrator
behavioral signs of estrus
age and castration
44. FEED
penis proper
#1 cost in production
dairy cattle pregnancy check
4 major reasons for culling dairy cows
45. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)
effects of estrogen
semen evaluation (BSE)
effects of BST
accessory sex glands
46. When are dairy cattle dehorned?
stag
~1 month
reason for seasonal breeding periods
elastrator
47. Front feet and head first. (except for hogs and dogs)
burdizzo
cowper's gland
age and castration
normal presentation of the fetus
48. 283 days
Sperm growth rate
vagina
cow ovulation
cow gestation
49. Actual heat cycle (period)
mastitis
penis proper
estrus
hypothalamus and pituitary gland
50. 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)
mare ovulation
mare estrus cycle
ewe ovulation