the results indicate that a receptor reserve exists for the alpha-1 and alpha-2 adrenoceptor-mediated effects of cirazoline and b-ht 933 , respectively , and that the alpha adrenoceptor reserve may be significantly larger for postsynaptic vascular alpha-1 adrenoceptors than for postsynaptic vascular alpha-2 adrenoceptors in canine saphenous vein .
C0034784
alpha
C0001639
alpha-2 adrenoceptors