Hormones Flashcards
(16 cards)
Action of GnRH
Triggers release of FSH and LH
Control of GnRH release
Released in pulsatile fashion, More released when aroused or there are high levels of oestrogen, Inhibited by oestrogen, testosterone, and prolactin
Action of FSH
Triggers spermatogenesis and development of follicles
Control of FSH
Released due to GnRH, Inhibited by inhibin
Action of LH
Trigger androgen production, Trigger ovulation
Control of LH
Released due to GnRH
Action of oestrogen
Trigger endometrium growth, Secrete alkali cervical mucus
Sites of oestrogen release
Theca and granulosa, Corpus luteum, Placenta
Action of progesterone
Increase negative feedback and decrease positive feedback of oestrogen, Secrete acid cervical mucus, Trigger endometrium growth
Sites of progesterone release
Theca and granulosa, Corpus luteum, Placenta
Action of inhibin
Inhibits FSH
Site of release of inhibin
Sertoli and granulosa cells
Describe the pattern of FSH levels over the menstrual cycle
Highest in the follicular phase, Slight peak during ovulation
Describe the pattern of LH levels over the menstrual cycle
Surge during ovulation
Describe the pattern of oestrogen levels over the menstrual cycle
Peak during ovulation, Rises during luteal phase
Describe the pattern of progesterone levels over the menstrual cycle
Highest during the luteal phase
