the effects in the uterine muscle of all three agonists were mediated through beta 2-adrenoceptors since beta 2-adrenoceptor blockers ( ici 118 , 551 and ips 339 ) antagonized the effects in concentrations which had only marginal effects on the atrial responses of the agonists .
C0001643
beta 2-adrenoceptors
C0034783
adrenoceptor