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Table 15-1

Sympathetic Nervous SystemParasympathetic Nervous System
Heart
Sinoatrial nodeTachycardiaBradycardia
Atrioventricular nodeIncreased conductionDecreased conduction
His-Purkinje systemIncreased automaticityMinimal effect
Increased conduction velocity
MyocardiumIncreased contractilityMinimal decrease in contractility
Increased conduction velocity
Increased automaticity
Coronary vesselsConstriction (α 1)
Dilation (β 1)
Blood Vessels
Skin and mucosaConstrictionDilation
Skeletal muscleConstrictionDilation
(α 1) > Dilation (β)
PulmonaryConstrictionDilation
Bronchial Smooth MuscleRelaxationContraction
Gastrointestinal Tract
GallbladderRelaxationContraction
Gut motility and secretionsDecreasedIncreased
Bladder
DetrusorRelaxationContraction
TrigoneContractionRelaxation
Glands (nasal, lacrimal, salivary, pancreatic)Vasoconstriction and reduced secretionStimulation of secretions
Sweat GlandsDiaphoresis (cholinergic)No effect
Apocrine GlandsThick and odiferous secretionsNo effect
Eyes
PupilMydriasisMiosis
CiliaryRelaxation for far visionContraction for near vision