these results demonstrate that alpha 2 adrenoceptors are involved in blood pressure control in the intact or sympathectomised shr but not following adrenal demedullation , suggesting that circulating catecholamines rather than neurally released noradrenaline ( na ) are responsible for these alpha 2-adrenoceptor-mediated pressor effects .
C0007412
catecholamines
C0028351
noradrenaline