Reproductive Flashcards
(76 cards)
The ovaries secre what?
Estrogen
Is most testosterone free or bound?
98% bound, to plasma proteins (SSGB and albumin)
Can melatonin play a roll in onset of puberty ?
Yes
In what weeks do the testes begin to develop in males?
6-7
What is used to block the conversion from test to dihydrotestosterone ?
5a-recutase
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
Lh stimulates what in the theca?
Cholesterol desmolase
Does the female genitalia require hormones ?
No
Growth of the tests is due primarily to what?
Increased number of seminiferous tubules which initiate spermatogeneisis
What promotes breast development ?
Estradiol
In what week do the ovaries develop in females?
Week 9
In the testes leydig cells synthesize what?
Testosterone
In boys when do they get pubic hair?
12-16
What stimulates secretory activity in the lobular ducts?
Both E and P
When does the growth spurt happen for girls?
11-14
In the ovaries theca cells synthesize what?
Progesterone
What is an ovarian steroid hormone?
17B hydroxysteroid dehydrogenase
In the testes germ cells produce what?
Spermatogonia
In the embryo antimullerian hormone causes what?
Atrophy of mullerian ducts
What three things make up sexual differentiation ?
Development of the gonads, internal genital tract, and external genitalia
Genetic sex is determined by what?
Sex chromosomes, XY in males, and XX in females
In what week are the gonads indifferent/bipotential?
5
A male genotype but a female phenotype is called what?
Androgen insensitivity syndrome
A Female who at puberty shows breasts development and no menstration as what?
Androgen insensitivity