Ovarian Histology Flashcards Preview

HRM - Anatomy/Embryology/Histology > Ovarian Histology > Flashcards

Flashcards in Ovarian Histology Deck (40):
1

What are the exocrine functions of the ovary?

Ova production
Cytogenic secretion

2

What are the endocrine functions of the ovary?

Estrogen production
Progesterone production

3

What structures within the ovary produce estrogen?

Theca interna
Theca granulosa

4

Which structure in the ovary produces progesterone?

Corpus luteum

5

What structures suspend the ovary?

Mesovarium
Peritoneal covering
Hilum

6

What type of tissue makes up the ovarian medulla?

Loose fibroelastic connective tissue

7

What structures make up the ovarian cortex?

Tunic albuginea
Stroma

8

Where do primordial germ cells come from?

Yolk sac

9

During which fetal month do oogonia become 1° oocytes?

Third

10

In what phase of mitosis/meiosis are 1° oocytes arrested?

Prophase 1

11

In what phase are 2° oocytes arrested?

Metaphase II

12

When is the first meiosis completed?

Just prior to ovulation

13

When is the second first meiosis completed?

Just after fertilization

14

What are the six phases of follicular development?

Primordial follicle
Unilaminar primary follicle
Multilaminar primary follicle
Secondary follicle
Graafian (mature) follicle

15

What two cell types are involved with primordial follicles?

1° oocyte
Follicular cells

16

What is the zona pellucida made of?

Gel-like neutral proteins

17

What structure forms during secondary follicle formation?

The antrum

18

What cells form around the oocyte inside the theca?

Granulosa cells

19

What cells are in the theca interna?

follicle cells

20

What do follicle cells produce?

Androgens

21

What do granulosa cells produce?

Estrogen

22

How much time does it take to mature an immature follicle?

3 months

23

What signals the final maturation of graafian follicles?

LH

24

When is the first polar body produced?

When the 1° oocyte becomes the 2° oocyte

25

What is the bundle of granulosa cells around the oocyte in a graafian follicle?

Corona Cumulus oophorus

26

What What is left behind in the ovary by a released ovum?

Corpus luteum

27

What role does FSH play in ovulation?

Stimulates granulosa cell growth and estrogen synthesis
Stimulates LH receptor synth

28

What role does LH play in ovulation?

Stimulates thecal cell growth and androgen production
Stimulates progesterone production in granulosa cells

29

What, specifically, is the trigger for ovulation?

LH surge

30

What enzyme is important for conversion of Testosterone to estrogen?

Aromatase

31

What must the testosterone cross in order to become estrogen?

Leave theca cell
Cross Membrana granulosa
Enter granulosa cell

32

What hormone levels increase substantially during the luteal phase?

Progesterone

33

What does the corpus luteum become after 14 days and with no pregnancy?

Corpora albicans

34

What maintains the corpus luteum in pregnancy?

HCG

35

What is the role of estrogen in the menstrual cycle?

Directs repair of uterus following menstruation

36

What hormone primarily stimulates the breasts to develop?

Estrogen

37

What is the role of progesterone in the menstrual cycle?

Prepares uterus for implantation (pro-gestation)

38

What makes relaxin?

Corpus luteum and decidual cells of placenta

39

What is the role of relaxin?

Inhibits contractions of myometrium during pregnancy
Promotes cervical dilation
Relaxes symphysis pubis

40

What is the role of inhibin?

Negative FSH feedback