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Flashcards in kumari chpt 2 Deck (41):
1

what are the 3 layers of hte graafian follicle

theca externa
theca interna
granulosa cells

2

when is oogenesis initiated in the female?

during fetal development

3

what is oogenesis?

prenatal phase of growth and differentiation
-the process by whihc female gamete are genereated

4

what is folliculogenesis?

differentiation in the prepubertal phase

5

what is folliculogenesis and oogensis?

differentiation in the pubertal phase

6

oogenesis leads to the formation of a haploid or diploid cell?

haploid

7

what stage are oocytes arrested in?

diplotene stage
-(dictyate stage of meiosis)

8

what initiates growth of primordial folllicles?

oogenesis

9

do all follicles become graafian follicles?

no

10

what is the cause of follicular atresia and when does it happen?

- lack of support signal
-can occur at any step during folliculogenesis

11

what is the time required to complete follicular growth?

~10 estrous cycles

12

do all follicles follow the same pattern of development in all species?

no

13

high levels of what in the oocytes inhibits oocyte maturation?

cAMP

14

low levels of what stimulate oocyte maturation?

cAMP

15

what stimulates synthesis of hylauronic acid in the granulosa cells?

LH surge prior to ovulation

16

low levels of what appears to be CRITICAL for the resumption of meiosis?

cAMP

17

what are the functions of anit-mullerian hormone?

inhibits growth of primordial follicles to become primary follicles

18

what happens after the LH surge?

ovualtion occurs and secondary oocyte at M II is released

19

in the mare, ovulation site is restricted to where on the ovary?

the ovulation fossa

20

in what female animal do dominant antral follicles develop and undergo ovulation only in the follicular phase?

sow

21

what cells of the female reopro tract have LH receptors?

thecal cells

22

what cels of the female repro tract have FSH receptors?

granulosa cells

23

___ production increases within the follicle in the pre-ovulatory phase and is highest at the time of ____ _____

-estrogen
-LH/FSH surge

24

low levels of estrogen = _____ feedback on FSH and LH secretion

positive

25

very high levels of estradiol = ___ feedback on FSH and LH secretion

negative

26

what is required for ovum maturation?

estrogen

27

in what species is estradiol actually luteolytic?

cow and sheep

28

high levels of estrogen (at a certain threshold) causes what>

LH surge

29

what increases cervical mucus secretion>

estrogen

30

estrogen increases what receptors in endometrium?

oxytocin receptors

31

what hormone is synthesized and secreted by the CL?

progesterone

32

enzymes involved in P4 synthesis

- increase desmolase (cholesterol to prenenolone)
-increase 3B-hydroxysteroid dehydrogenase (prenenolone to P4)
-decrease 12a-hydroxylase (conversion of P4 to androgen)

33

which animal produces progesterone BEFORE ovulation?

bitch

34

small luteal cells have what kind of receptors?

LH receptors

35

large luteal cells have what kind of receptors?

PGF2a receptors

36

large luteal cells produce what?

progesterone

37

what hormone inhibits uterine contraction

P4

38

what causes development of mammary glands during pregnancy?

P4

39

what hormone prevents estrus>

P4

40

progesterone acts primarily on the ______ and _____ FHS/LH secretion

-hypothalamus
-inhibits

41

does FSH or LH have a longer half-life?

FSH