it is concluded that facilitatory prejunctional beta-adrenoceptors ( probably of the beta 2-subtype ) are present in human arteries and veins , but that under the conditions of these experiments , neither transmitter noradrenaline , nor adrenaline that has been incorporated into transmitter stores with noradrenaline , activate these prejunctional beta-adrenoceptors .
C0014563
adrenaline
C0028351
noradrenaline