Concerning the hypothalamopituitary axis :- a. secretion of LH is independent of gonadotrophin releasing hormone b. GnRH neurons are absent in Kallaman syndrome c. oestradiol has an acute positive feedback effect on gonadotrophin secretion d. oestradiol has a chronic negative feedback action on gonadotrophin secretion e.the preovulatory rise in gonadotrophin releasing hormone secretion is due to an increase in gonadotrophin releasing hormone pulse frequency
Posted on: Thu, 07 Aug 2014 16:14:55 +0000