the responsiveness of the hypothalamus to electrochemical stimulation ( ecs ) and of the pituitary to lutenizing hormone-releasing hormone ( lhrh ) was examined following either endogenous lh release or exogenous lh infusion on the afternoon of proestrus in rats that had received nembutal to block the lh surge .
C0020663
hypothalamus
C0023610
lutenizing hormone-releasing hormone