in the vagus nerve -- smooth muscle preparation isolated from the chick proventriculus , adrenaline , clonidine ( 10 ( -8 ) - 2.5 x 10 ( -7 ) m ) , noradrenaline ( 10 ( -7 ) - 2.5 x 10 ( -6 ) m ) and dopamine ( 10 ( -5 ) - 10 ( -4 ) m ) inhibited the contraction induced by low frequency ( 0.5 hz ) stimulation of the vagus nerve , but they did not inhibit the contraction elicited by acetylcholine ( 5 x 10 ( -8 ) - 5 x 10 ( -7 ) m ) .
C0014563
adrenaline
C0028351
noradrenaline