the endogenous role of the alpha-adrenergic system in the maintenance of mean arterial pressure ( map ) , total peripheral resistance ( tpr ) , cardiac output ( co ) and its distribution , and plasma norepinephrine and epinephrine release was investigated by the administration of selective alpha-adrenoceptor antagonists to halothane-anesthetized rats .
C0028351
norepinephrine
C0014563
epinephrine