Nitric oxide is endogenously released in the airways by nitric oxide synthase. Functionally, two isoforms of this enzyme exist: constitutive and inducible. The former seems to protect airways from ...

Preganglion fibers release acetylcholine at the level of peribronchial ganglia, from which postganglion fibers are generated, leading to the release of acetylcholine in the bronchial wall.

[13] nAChRs as Regulators of Inflammation and Cellular Function. The parasympathetic nervous system, primarily the vagus nerve, has been called the 'cholinergic anti-inflammatory pathway'.