when these substances were applied for several minutes , the release reached its maximum a considerable time after their removal , except with leptazol when release diminished at once after removal.4 the excitatory substances had little or no effect on arterial blood pressure when applied to the vasopressin releasing area , but produced strong pressor responses when applied to a more rostrally situated area.5 it is concluded that the excitatory substances release vasopressin and raise arterial blood pressure because they are antagonists of gamma-aminobutyric acid and/or glycine and that numerous inhibitory neurones which release these amino-acids synapse at the ventral surface of the medulla .
C0017890
glycine
C0002520
amino-acids