in the present study the characteristics of pre-junctional alpha-adrenoceptors at motor nerve terminals have been compared with post-junctional ( vascular ) alpha-adrenoceptors in the cat hind limb.2 reversal of partial ( + ) -tubocurarine blockade of contractions of the tibialis anterior muscle was used to monitor pre-junctional activity and increases in hindlimb vascular resistance to assess post-junctional actions at alpha-adrenoceptors.3 responses to intra-arterial injections of noradrenaline , adrenaline , phenylephrine , oxymetazoline , methoxamine and clonidine were monitored .
C0001639
alpha-adrenoceptors
C0034784
alpha-adrenoceptors