How does PNS stimulation affect the lungs?

Answer 1

parasympathetic system (PSNS) will a)vasoconstrict the lumen of airway by contracting smooth muscle cells along the conducting passage via M3 Receptor, b)increase mucus secretion via M3

Overall it'll interfere with normal breathing pattern and obstruct normal breathing.

Answer 2

Parasympathetic stimulation of the lungs and smooth muscle surrounding the bronchi results in bronchial constriction or tightening. Parasympathetic stimulation can also result in increased activity by glands that control bronchial secretions.

Answer 3

bronchodilation