the responses to noradrenaline and adrenaline ( in the presence of pindolol ; 3 x 10 ( -8 ) m ) were not affected by phentolamine ( 10 ( -6 ) m ) .9 the results indicate that adrenoceptors mediating positive inotropic responses in the dog ventricle are of the beta-type and that post-synaptic alpha-adrenoceptors are not involved .
C0034783
adrenoceptors
C0034784
alpha-adrenoceptors