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The Brain: The Nervous System

The Autonomic Nervous System

Brain Facts
Neuron Structure
Neuron Quiz
Cerebral Hemispheres
Lobes of The Brain
Lobes of The Brain Quiz
The Autonomic Nervous System
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Table 1.  Some Effects of the Autonomic Nervous   
Sympathetic Structure Parasympathetic
Rate increased Heart Rate decreased
Force increased Heart Force decreased
Broncial muscle relaxed Lungs Broncial muscle contracted
Pupil dilation Eye Pupil constriction
Motility reduced Intestine Digestion increased
Sphincter closed Bladder Sphincter relaxed
Decreased urin secretion Kidneys Increased urin secretion

The Autonomic Nervous System is made up of two opposing units, which are the sympathetic nervous system, and the parasympathetic nervous system
Sympathetic Nervous System: The sympathetic nerrvous system is responsible for  preparing your body for stress. The nerves from the symapthetic vervous sytemcome from the ribs and a small part of the back
Parasympathetic Nervous System: The parasympathetic nervous system restores the bodies normal balance. The nerves from this system exit  directly from the brain or from either the neck area or the tail bone. These nerves that exit diectly from the brain are called cranial nerves.

Information from Nelson Biology 12, 2003
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Created By Kenisha Hanson