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The 23 pages that link to Parasympathetic nervous system, each with the reason it gives.

• Muscarinic acetylcholine receptorRelated: Muscarinic receptors mediate many parasympathetic effects at target organs.

• Cranial nervesRelated: Four cranial nerves deliver parasympathetic signals to the head and thoracic and abdominal organs.

• IrisRelated: Parasympathetic signals drive the sphincter pupillae to constrict the pupil.

• PupilRelated: Parasympathetic signals activate the iris sphincter and constrict the pupil.

• BaroreflexRelated: Increased baroreceptor input promotes vagal influence, slowing the heart.

• Salivary glandRelated: Parasympathetic signals strongly promote watery saliva production.

• Cholinergic crisisRelated: Excess parasympathetic signaling accounts for many muscarinic symptoms in the crisis.

• AnticholinergicRelated: Blocking muscarinic signaling often weakens parasympathetic effects in organs.

• Anticholinergic syndromeRelated: Its suppressed activity explains dry secretions, reduced gut movement, urinary retention, and a fast pulse.

• BronchoconstrictionRelated: Vagal parasympathetic signals can trigger airway smooth-muscle contraction.

• Celiac plexusRelated: Parasympathetic fibers also travel through the plexus to abdominal organs.

• MuscarineRelated: Its normal functions help explain muscarine’s effects on secretions, digestion, and heart rate.

• Walter Rudolf HessRelated: Hess also studied diencephalic responses associated with parasympathetic activity.