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VMED 155 THERIO LEC > TOPIC 2: ESTRUS > Flashcards

TOPIC 2: ESTRUS Flashcards

1
Q

surest sign animal is in heat

A

Receptivity

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2
Q

period of receptivity

A

estrus

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3
Q

happens in animals that are seasonally polyestrous animal such as Sheep

A

anestrus

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4
Q

period where animal not in heat but have still ovarian activity

A

diestrus

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5
Q

phase where there is marked increase in reproductive activity

A

proestrus

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6
Q

phase where CL regresses from previous cycle

A

proestrus

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7
Q

phase of cornification of cells

A

proestrus

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8
Q

The period of acceptance of the male

A

estrus

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9
Q

The uterine, cervical and vaginal glands secrete increased amounts of mucus; the vaginal epithelium and endometrium become hyperaemic and congested, and the cervix is relaxed.

A

estrus

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10
Q

Ovulation is a spontaneous process in most domestic species

A

true: Except cat, rabbit and camelids
Ovulation is induced by the act of coitus

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11
Q

The main ovarian hormone produced in estrus is

A

estradiol

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12
Q

follicular phase of the cycle

A

Proestrus and Estrus

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13
Q

s the main hormone in the follicular phase
in estrus

A

progesterone

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14
Q

follicular growth and regression of CL

A

proestrus

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15
Q

follicular growth and ovulation occrs

A

estrus

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16
Q

there is reduction of mucus secretion from uterine,cervical, and vaginal glands

A

metestrus

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17
Q

The granulosa and ___cells of the ovulated follicle give rise to ____cells, which are responsible for the formation of the CL

A

theca
lutein (luteal)

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18
Q

phase where there is fully functional CL

A

diestrus

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19
Q

cervix become constricted and secretions become scant

A

diestru

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20
Q

luteal phase of the cycle

A

met and di

21
Q

main hormone in luteal phase

A

P4

22
Q

In most of our domestic species ____ is the only readily identifiable phase of the oestrous cycle

A

estrus

23
Q

phase where there is nonfunctional CL and minimal follicular devt

A

anestrus

24
Q

hormone that regresses CL

A

PGF2a

25
Q

hypothalamus produces (hormones)

A

GnRH, kisspeptin

26
Q

anterior pituitary produces what hormones/s

A

FSH, LH

27
Q

ovary produces what hormone/s

A

progesteron, estradiol

28
Q

uterus [roduces what hormone

A

pgf2a

29
Q

Foals are aged from 1 January, irrespective of their actual birth date in southern hemisphere t/f

A

false. northern

30
Q

breeeding season in northern hemisphere

A

FEB 15-JULY1

31
Q

The average length of the equine oestrous cycle

A

20-23 days

32
Q

In heat: cervix is relaxed due to action of __

A

estrogen

33
Q

During anoestrus and pregnancy:
both the vagina and cervix have a pale pink colour the cervix is narrow, constricted and generally turned away from the midline
The external os being filled with tenacious mucus

t.f

A

false. blanched color

34
Q

If the mare is in oestrus the stallion usually exhibits

A

flehmen

35
Q

eCG does not stimulate ovarian activity in mares in anestrus

A

true

36
Q

desloreline effect

A

GnRH

37
Q

in ewes, administration of eCG should be preceded by ___ administration

A

progesterone

38
Q

hormone used in vaginal devices in cows and ewes

A

progesterone

39
Q

Prior to progesterone treatment:
mare should have _____
cows should have ____

A

adeq lighting
GnRH admin

40
Q

_____ should be administered at the time of progesterone withdrawal (cows)

A

Prostaglandin - pGF2a

41
Q

GnRH or ___ should be administered shortly after progesterone withdrawal (mare, cow, ewe)

A

hCG

42
Q

kisspeptin site of action

A

hypothalamus where GnrH neurons are located

43
Q

Marketed mainly as a contraceptive in dogs

A

suprelorin

44
Q

function of eCG

A

stimulates follicle growth

45
Q

this should not be used in in lambs but only in mature sheep

A

melatonin

46
Q

what will happen if immature sheep will be given melatonin?

A

delayed onset of puberty

47
Q

why is P4 given?

A

to advance and induce heat

48
Q

prolactin inhibitors like ____ and _____ can cause _____ of follicles

A

cabergolin, bromcriptine
luteinization

VMED 155 THERIO LEC (6 decks)

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