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
