Physiology Flashcards
Key reproduction hormones?
- GnRH
- FSH
- LH
Where is GnRH secreted from
- hypothalamus
Role of FSH
- Initates follicular growth
Role of LH
- Stimulates further devlopment of follicles
- ovulation
Ovarian follicles secrete what?
- oestrogen
What is secreted by the corpus luteum?
- progesterone
Ovarian changes during the menstrual phase
- under influence of FSH
- primary follicles -> secondary follicles
What happens to the uterus during the menstrual phase?
- decreased oestrogen and progesterone -> prostaglandin secretion
- prostaglandins cause arteriole constriction
- stratum functionalis sloughs off
What changes occur to the ovaries during the pre-ovulatory phase
- secondary follicles secrete oestrogen
- graafian follicle developes
What changes occur to the uterus during the pre-ovulatory phase?
- oestrogens -> growth of endometrium
- stratum basilar -> mitosis -> stratum functonalis
What changes occur in the ovaries during the ovulatory phase?
- oestrogens -> GnRH release -> LH and FSH increase
- graafian follicle rupture
- secondary oocyte released
What changes occur to the uterus during the ovulatory phase?
- progesterone and oestrogen thicken the endometrium
Changes that occur to the ovaries during the post-ovulation phase?
- corpus luteum under LH influence
- corpus luteum -> progesterone, oestrogen, relaxin and inhibin
- corpus luteum -> corpus albicans if no fertilisation
Changes that occur to the uterus post-ovulation
- progesterone and oestrogen cause vascularisation and growth
- glands secrete glycogen
Physical signs of pre-menstrual disorders?
- breast tenderness
- bloating
- weight gain
- headache
