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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. Important 'landmark' during palpation
Grading choice
cervix
Dairy calves are removed from cow at birth to...
cowper's gland
2. 19-23 (21) days
ewe's estrous cycle
sow gestation
colostrum
cow estrus cycle
3. 114 days
sow gestation
Sperm survival specs
testis (gonads)
1. more cost effective - 2. powdered milk is in excess production
4. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)
mare's estrous cycle
monorchid
cervix
accessory sex glands
5. 1. brain function - 2. blood flow - 3. willing female
rectal palpation (BSE)
seasonally polyestrous
6-8 weeks
what has to happen for males for copulation to occur
6. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %
uterus
~1 month
Jersey Cow
1. more cost effective - 2. powdered milk is in excess production
7. 14-19 (17) days
sow gestation
mare estrus
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
8. 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)
#1 cost in production
age and castration
what has to happen for males for copulation to occur
9. 1-3 days
sow estrus
cervix
Holstein Cow
cowper's gland
10. Produce testosterone. located between the seminiferous tubules
purpose of Breeding Soundness Exam (BSE) for males
leydid or interstitial cells
sow gestation
hormones
11. Birthing process (termination of gestation)
burdizzo
elastrator
sow estrus cycle
Parturition
12. Standing to be mounted (last one able to notice); mounting other animals; social behavior-restless - gregarious - activity - vocalizing; frequent urination; mucous discharge
Lutinizing Hormone in females
testosterone
behavioral signs of estrus
dartos muscle
13. Provide nourishment for the developing sperm
mare gestation
retractor muscles
Dairy Cattle milking schedule
sertoli cells
14. Check feet and legs - look for masculine traits in build such as crest and muscling
humans: stress level vs sperm
dairy cattle pregnancy check
visual evaluation (BSE)
femininity of a heifer
15. When are steers and heifers weaned from bottle feeding?
penis proper
6-8 weeks
things to check for in a breeding soundness exam (BSE)
ewe estrus cycle
16. 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.
prostaglandin
visual evaluation (BSE)
estrus
why does the cow need fat deposits during pregnancy?
17. (FSH) causes egg to mature in females
colostrum
Follical Stimulating in females
mare 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
18. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.
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19. What helps regulate spermatogenesis?
testosterone
estrus
oviducts
Sperm growth rate
20. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING
1. more cost effective - 2. powdered milk is in excess production
Where livelihood is in agriculture
reason for seasonal breeding periods
van deferens
21. Help to signal hormone levels which we need both in the brain right next to each other.
Hard
hypothalamus and pituitary gland
Dairy Cattle Gestation
Where livelihood is in agriculture
22. Luteolysis happens because of the ____________ hormone
prostaglandin
reason for seasonal breeding periods
Parturition
sigmoid flexure
23. 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.
monorchid
uterus
dairy cattle pregnancy check
visual evaluation (BSE)
24. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells
butterfat
sow estrus cycle
organs used in spermatogenesis
things to check for in a breeding soundness exam (BSE)
25. Check feet and legs - look for masculine traits in build such as crest and muscling
visual evaluation (BSE)
sow estrus cycle
femininity of a heifer
monorchid
26. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood
penis proper
cow ovulation
Lutinizing Hormone in males
Grading choice
27. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total
testis (gonads)
6-8 weeks
purpose of Breeding Soundness Exam (BSE) for males
what has to happen for males for copulation to occur
28. 283 days
scrotal circumference (BSE)
Hormones from both the fetus and the mom.
cow gestation
Avg. bull specs
29. Sperm is produced here
cow estrus cycle
normal presentation of the fetus
seasonally polyestrous
seminiferous tubules
30. Larger the cow - more milk is produced; smaller the cow - less milk is produced
vagina
Size of cow in relation to the amount of milk produced
cryptorchid
stag
31. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm
Dairy Cattle milking schedule
Follical Stimulating in males
effects of estrogen
seminiferous tubules
32. % of fat in milk. makes cheeses and ice cream. regulates cost of milk
testosterone
butterfat
~1 month
Culls bulls earlier (2 reasons)
33. Superior genes are _______ to multiply
kidney stones also called ________ ___________ can develop in the sigmoid flexure
Hard
mare gestation
spermatogenesis
34. 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
Hormones from both the fetus and the mom.
Reasons for gestation length being affected
effects of BST
normal presentation of the fetus
35. Days which have increasing daylight hours
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36. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm
Follical Stimulating in males
normal presentation of the fetus
ewe gestation
Lutinizing Hormone in females
37. 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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38. 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.
mastitis
estrus
burdizzo
why does the cow need fat deposits during pregnancy?
39. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase
cremaster muscle
age and castration
cowper's gland
Grading choice
40. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)
Dairy Cattle milking schedule
femininity of a heifer
cowper's gland
seasonally polyestrous
41. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase
sow estrus cycle
age and castration
humans: stress level vs sperm
penis sizes vs delivering methods
42. Animal which has been castrated after puberty
monorchid
stag
penis proper
Dairy Cattle Gestation
43. Important 'landmark' during palpation
cervix
1. more cost effective - 2. powdered milk is in excess production
sow estrus cycle
cow gestation
44. Knife-loose ~1wk of growth. band-loose ~2wks of growth.
mare estrus
Sperm survival specs
growth lost from castration methods (knife & band)
effects of BST
45. Actual heat cycle (period)
monorchid
estrus
elastrator
spermatogenesis
46. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).
burdizzo
4 major reasons for culling dairy cows
Dairy Cattle milking schedule
hormones
47. Days which have decreasing daylight hours
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48. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.
dartos muscle
retractor muscles
feeding a high producing dairy cow
Lutinizing Hormone in females
49. Superior genes are _______ to multiply
retractor muscles
semen evaluation (BSE)
burdizzo
Hard
50. Animals which have only one estrous cycle (ex: dog - fox)
castration
monestrous
Dairy Cattle Gestation
reasons for castration