| Sympathetic Nervous System | Parasympathetic Nervous System | |
|---|---|---|
| Heart | ||
| Sinoatrial node | Tachycardia | Bradycardia |
| Atrioventricular node | Increased conduction | Decreased conduction |
| His-Purkinje system | Increased automaticity | Minimal effect |
| Increased conduction velocity | ||
| Myocardium | Increased contractility | Minimal decrease in contractility |
| Increased conduction velocity | ||
| Increased automaticity | ||
| Coronary vessels | Constriction (α 1) | |
| Dilation (β 1) | ||
| Blood Vessels | ||
| Skin and mucosa | Constriction | Dilation |
| Skeletal muscle | Constriction | Dilation |
| (α 1) > Dilation (β) | ||
| Pulmonary | Constriction | Dilation |
| Bronchial Smooth Muscle | Relaxation | Contraction |
| Gastrointestinal Tract | ||
| Gallbladder | Relaxation | Contraction |
| Gut motility and secretions | Decreased | Increased |
| Bladder | ||
| Detrusor | Relaxation | Contraction |
| Trigone | Contraction | Relaxation |
| Glands (nasal, lacrimal, salivary, pancreatic) | Vasoconstriction and reduced secretion | Stimulation of secretions |
| Sweat Glands | Diaphoresis (cholinergic) | No effect |
| Apocrine Glands | Thick and odiferous secretions | No effect |
| Eyes | ||
| Pupil | Mydriasis | Miosis |
| Ciliary | Relaxation for far vision | Contraction for near vision |