Branches of the nervous system,which can cause relaxation of airway smooth muscle,include which of the following?
1)Sympathetic nerves
2)Parasympathetic nerves
3)Nonadrenergic,noncholinergic (NANC)inhibitory nerves

Question

Quizplus · Accepted Answer

There is evidence of a branch of nerves that are neither parasympathetic (cholinergic)nor sympathetic (adrenergic),which can cause relaxation of airway smooth muscle.These nerves have been termed nonadrenergic,noncholinergic (NANC)inhibitory nerves.They are also referred to as simply nonadrenergic inhibitory nerves because adrenergic activity relaxes airway smooth muscle,and this is an additional but nonadrenergic neural method of relaxing such smooth muscle.

Branches of the Nervous System,which Can Cause Relaxation of Airway