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VMED 155 THERIO LEC > additional > Flashcards

additional Flashcards

1
Q

when does LH peak

A

before ovulation

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2
Q

when does FSH peak

A

diestrus if nagovulate
if not nagovulate - right after ovulation

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3
Q

when does P4 peak

A

right after ovulation

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4
Q

progesterone will remain high until CL is destroyed

A

true

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5
Q

estradiol has an exponential increase when?

A

it is near ovulation

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6
Q

when does estradiol decrease?

A

after ovulation

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7
Q

__ and__ are luteotrophic unlike PGF2a

A

P4 and E2

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8
Q

in Maternal recognition of pregnancy the developing embryo should signal that the dam is pregnant to stop the estrous cycle
and the concentration of prostaglandin in maternal blood must be sustained

t/f

A

false. progesterone

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9
Q

suppresses pulsatile prostaglandin secretion
in goats

A

Caprine trophoblast protein (cTP-1)/ caprine tau interferon (oIFN- tau)

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10
Q

migration of conceptus in mares happen at days 9-16 T/F

A

true

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11
Q

why is maternal recognition important?

A

to retain CL

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12
Q

why is there no need for maternal recognition in dogs and cats

A

CL life > gestation phase

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13
Q

transrectal palpation for pregnancy diagnosis can also be done in pigs T/F

A

true

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14
Q

estrogen production by the conceptus alter the transport of PGF2a in pigs T/F

A

true

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15
Q

tx to anestrus sheep to restore reproductive function

A

kisspeptin

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16
Q

heifers can be bred at an earlier stage if it has a large scrotal circumference

A

true

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17
Q

light manipulation is effective in what species

A
  • Mare, ewe, goat, cats (feral)
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18
Q

Providing one eye with blue light is enough to inhibit melatonin production T/F

A

true

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19
Q
  • Common reproductive phenomena in cattle
A

subestrus or silent heat

20
Q

kisspeptin can also be given in mares, mice, huamns

A

true

21
Q

Prostaglandin should be administered of AFTER progesterone withdrawal (cows) T/F

A

at the time

22
Q

-GnRH or hCG administration shortly BEFORE progesterone withdrawal (mare, cow, ewe)

A

After

23
Q

T/F kisspeptin increases during breeding season

A

true

24
Q

synthetic GnRH are effective only to animals close to puberty

A

true

25
Q

GnRH in mares should be given BEFORE vernal transition

A

AFTER

26
Q

what hormones do deslorelin inhibits when administered for prolonged periods

A

FSH, LH

27
Q

placed in vulva to continuously produce progesterone

A

eCG thru - Controlled internal drug release (CIDR)

28
Q

accumulation of fluids in abdomen, barrel shaped abdomen

A

dropsy

29
Q

inhibin is produced by __ in females and___ in males

A

granulosa cells

sertoli cells in testis

30
Q

these 2 act together to suppress FSH secretion.

A

Inhibin and oestradiol

31
Q

t/f Tonic release of gonadotrophins, especially LH, does not occur at a steady rate but in a pulsatile fashion in response to a similar release of GnRH from the hypothalamus

A

true

32
Q

Antral follicles are also known as tertiary follicles or

A

graafian follicles

33
Q

the process whereby one or more of the recruited
follicles are selected to develop further

A

selection

34
Q

he mechanism whereby one (the dominant fol-
licle) or several codominant follicles undergo further maturation in an environment in which the growth and development of other antral follicles is suppressed

A

dominance

35
Q

gonadotrophin stimulation of a cohort of rapidly
growing antral follicles

A

recruitment

36
Q

3 accepted descriptions of folliculogenesis

A

recruitment, selection, dominance

37
Q

The dominant follicle secretes inhibin and oestradiol that feedbacks on the hypothalamus–pituitary axis to reduce circulatory FSH concentrations. Thus any antral follicle that is still FSH-dependent will regress and undergo atresia. T/F

A

true

38
Q

The dominant follicle will further develop and can remain dominant for several days. It will undergo its final maturation and ovulate if progesterone concentrations increase T/F

A

not increase. DECLINE

39
Q

____ is suppressive to LH secretin enabling increase in FSH

A

progesterone

40
Q

plays a critically important role in the inhibition of the tonic mode of LH secretion

A

p4

41
Q

t/f only FSH can induce early antral follicular growth

A

true

42
Q

CL is rapidly formed from the____ follicle after ovulation,

A

Graafian

43
Q

The hormones that are most likely to be involved in stimulating CL formation and maintenance

A

LH prolactin

44
Q

prolactin plays a critical role in maintaining the CL in rodents and the dog T/F

A

true

45
Q

2 components of luteal regresion

A

functional and structural regressio

46
Q

current evidence indicates that leptin is likely to exert its effects on LH secretion by modulating ____

A

kisspeptin

VMED 155 THERIO LEC (6 decks)

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