PRACTICAL PROCEDURES [Next Article][Issue Index][Home Page][Previous Article]
Issue 5 (1995) Article 6   Go to page: 1 2
The autonomic nervous system (Continued)

Table 1: Responses of major organs to autonomic nerve impulses

OrganSympathetic StimulationParasympathetic Stimulation
Heart Increased heart rate beta1 (& beta2) Decreased heart rate
Increased force of contraction beta1 (& beta2) Decreased force of contraction
Increased conduction velocity Decreased conduction velocity
Arteries Constriction (alpha1) Dilation
Dilation (beta2)
Veins Constriction (alpha1)  
Dilation (beta2)
Lungs Bronchial muscle relaxation (beta2) Bronchial muscle contraction
Increased bronchial gland secretions
Gastro-
intestinal tract
Decreased motility (beta2) Increased motility
Contraction of sphincters (alpha) Relaxation of sphincters
Liver Glycogenolysis (beta2 & alpha) Glycogen synthesis
Gluconeogenesis (beta2 & alpha)
Lipolysis (beta2 & alpha)
Kidney Renin secretion (beta2)  
Bladder Detrusor relaxation (beta2) Detrusor contraction
Contraction of sphincter (alpha) Relaxation of sphincter
Uterus Contraction of pregnant uterus (alpha)  
Relaxation of pregnant and non-pregnant uterus (beta2)
Eye Dilates pupil (alpha) Constricts pupil
Increased lacrimal gland secretions
Submandibular & parotid glands Viscous salivary secretions (alpha) Watery salivary secretions


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