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Endo Final > Reproductive > Flashcards

Flashcards in Reproductive Deck (76)
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1

The ovaries secre what?

Estrogen

2

Is most testosterone free or bound?

98% bound, to plasma proteins (SSGB and albumin)

3

Can melatonin play a roll in onset of puberty ?

Yes

4

In what weeks do the testes begin to develop in males?

6-7

5

What is used to block the conversion from test to dihydrotestosterone ?

5a-recutase

6

Growth and development of the external genitalia happens at what week in utero and is dependent on what?

9-10 weeks, conversion of test to dihydrotesosterone

7

Lh stimulates what in the theca?

Cholesterol desmolase

8

Does the female genitalia require hormones ?

No

9

Growth of the tests is due primarily to what?

Increased number of seminiferous tubules which initiate spermatogeneisis

10

What promotes breast development ?

Estradiol

11

In what week do the ovaries develop in females?

Week 9

12

In the testes leydig cells synthesize what?

Testosterone

13

In boys when do they get pubic hair?

12-16

14

What stimulates secretory activity in the lobular ducts?

Both E and P

15

When does the growth spurt happen for girls?

11-14

16

In the ovaries theca cells synthesize what?

Progesterone

17

What is an ovarian steroid hormone?

17B hydroxysteroid dehydrogenase

18

In the testes germ cells produce what?

Spermatogonia

19

In the embryo antimullerian hormone causes what?

Atrophy of mullerian ducts

20

What three things make up sexual differentiation ?

Development of the gonads, internal genital tract, and external genitalia

21

Genetic sex is determined by what?

Sex chromosomes, XY in males, and XX in females

22

In what week are the gonads indifferent/bipotential?

5

23

A male genotype but a female phenotype is called what?

Androgen insensitivity syndrome

24

A Female who at puberty shows breasts development and no menstration as what?

Androgen insensitivity

25

In the second and third trimesters

Estriol

26

In the embryo what testosterone does what?

Growth and differentiation of wolffian ducts

27

What do men lack in the testes?

21 B hydroxylase, 11B hydroxylase

28

Estrogen up regulates progesterone but....

Progesterone down regulates estrogen

29

Development of the mammary gland requires what hormone?

Estrogen

30

In the ovaries germ cells produce what ?

Oogonia