pretreatment with the ganglionic blocker chlorisondamine greatly reduced the plasma adrenaline response to alpha ltx but had almost no effect on the noradrenaline response , indicating that alpha ltx-stimulation of sympathetic nerve terminals is direct , whereas catecholamine release from the adrenal medulla is probably mediated by preganglionic release of acetylcholine .
C0014563
adrenaline
C0028351
noradrenaline