TOPIC 2: ESTRUS

Question 1

surest sign animal is in heat

Answer 1

Receptivity

Question 2

period of receptivity

Answer 2

estrus

Question 3

happens in animals that are seasonally polyestrous animal such as Sheep

Answer 3

anestrus

Question 4

period where animal not in heat but have still ovarian activity

Answer 4

diestrus

Question 5

phase where there is marked increase in reproductive activity

Answer 5

proestrus

Question 6

phase where CL regresses from previous cycle

Answer 6

proestrus

Question 7

phase of cornification of cells

Answer 7

proestrus

Question 8

The period of acceptance of the male

Answer 8

estrus

Question 9

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.

Answer 9

estrus

Question 10

Ovulation is a spontaneous process in most domestic species

Answer 10

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

Question 11

The main ovarian hormone produced in estrus is

Answer 11

estradiol

Question 12

follicular phase of the cycle

Answer 12

Proestrus and Estrus

Question 13

s the main hormone in the follicular phase
in estrus

Answer 13

progesterone

Question 14

follicular growth and regression of CL

Answer 14

proestrus

Question 15

follicular growth and ovulation occrs

Answer 15

estrus

Question 16

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

Answer 16

metestrus

Question 17

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

Answer 17

theca
lutein (luteal)

Question 18

phase where there is fully functional CL

Answer 18

diestrus

Question 19

cervix become constricted and secretions become scant

Answer 19

diestru

Question 20

luteal phase of the cycle

Answer 20

met and di

Question 21

main hormone in luteal phase

Answer 21

P4

Question 22

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

Answer 22

estrus

Question 23

phase where there is nonfunctional CL and minimal follicular devt

Answer 23

anestrus

Question 24

hormone that regresses CL

Answer 24

PGF2a

Question 25

hypothalamus produces (hormones)

Answer 25

GnRH, kisspeptin

Question 26

anterior pituitary produces what hormones/s

Answer 26

FSH, LH

Question 27

ovary produces what hormone/s

Answer 27

progesteron, estradiol

Question 28

uterus [roduces what hormone

Answer 28

pgf2a

Question 29

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

Answer 29

false. northern

Question 30

breeeding season in northern hemisphere

Answer 30

FEB 15-JULY1

Question 31

The average length of the equine oestrous cycle

Answer 31

20-23 days

Question 32

In heat: cervix is relaxed due to action of __

Answer 32

estrogen

Question 33

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

Answer 33

false. blanched color

Question 34

If the mare is in oestrus the stallion usually exhibits

Answer 34

flehmen

Question 35

eCG does not stimulate ovarian activity in mares in anestrus

Answer 35

true

Question 36

desloreline effect

Answer 36

GnRH

Question 37

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

Answer 37

progesterone

Question 38

hormone used in vaginal devices in cows and ewes

Answer 38

progesterone

Question 39

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

Answer 39

adeq lighting GnRH admin

Question 40

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

Answer 40

Prostaglandin - pGF2a

Question 41

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

Answer 41

hCG

Question 42

kisspeptin site of action

Answer 42

hypothalamus where GnrH neurons are located

Question 43

Marketed mainly as a contraceptive in dogs

Answer 43

suprelorin

Question 44

function of eCG

Answer 44

stimulates follicle growth

Question 45

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

Answer 45

melatonin

Question 46

what will happen if immature sheep will be given melatonin?

Answer 46

delayed onset of puberty

Question 47

why is P4 given?

Answer 47

to advance and induce heat

Question 48

prolactin inhibitors like ____ and _____ can cause _____ of follicles

Answer 48

cabergolin, bromcriptine luteinization