the data suggest : ( 1 ) the majority of the influence of intrinsic opioids on secretion of oxt is not mediated via interaction with noradrenaline or dopamine systems , ( 2 ) the weaker influence of intrinsic opioids over avp secretion may be mediated via catecholamines , ( 3 ) the majority of neurohypophysial noradrenaline is derived from projections of ascending medullary cell groups .
C0007412
catecholamines
C0028351
noradrenaline