human airway smooth muscle possesses the following anatomic , morphologic and functional characteristics : cholinergic excitatory nerves , non-adrenergic non-cholinergic ( nanc ) inhibitor nerves , non-cholinergic non-adrenergic excitatory nerves , no adrenergic nerves , an ultrastructural morphology of the ganglia , similar to the one in the gastro intestinal tract , smooth muscle cell-to-cell connection of the gap junction or nexus type , a possible spontaneous myogenic activity , beta-2-receptors with inhibitory effect and alpha-1-receptors with excitatory effect .
C1267092
smooth muscle
C1135918
smooth muscle