Reproductive System Flashcards
1
Q
exp: hypothalamic pituitary gonadal axis
A
- hypothalamus released GnRH
- stimulates anterior pituitary
- produces LH and FSH
- develops follicles in ovary
- theca granulosa around follicles secrete oestrogen
- oestrogen negative feedback to hypothalamus
2
Q
most prevlaent form oestrogen
A
17-beta oestradiol
3
Q
role: oestrogen
A
acts on tissues with oestrogen receptors to promote secondary female sexual characteristics
4
Q
def: female secondary sexual characteristics
A
- breast tissue development
- growth and devlopment of female sex organs at puberty (vulva, vagina and uterus)
- blood vessel development in uterus
- development of endometrium
5
Q
what produces oestrogen
A
ovaries
6
Q
what produces progesterone
A
corpus luteum after ovulation
7
Q
where is progesterone produced after pregnancy occurs
A
placenta after 10 weeks gestation
8
Q
role: progesterone
A
- acts on tissues previousy stimulated by oestrogen
- thicken and maintain endometrium
- thicken cervical mucus
- increase body temperature
9
Q
when does puberty normally occur in girls and how long does it last
A
8-14
4 years
10
Q
why do overweight children enter puberty earlier
A
enzyme aromatase found in adipose tissue is part of oestrogen production so >adipose tissue, more oestrogen production
11
Q
how does puberty start in girls
A
- breast bupubic hair follows
- onset of menstrual periodsds first
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