Peripheral nervous system.
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   Afferent neurons transmit information to the CNS.
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   Efferent neurons transmit information away from the CNS.
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<BR><LI> The  motor  system  carries  signals  to  skeletal  muscles and is
voluntary.
<BR><LI> The autonomic nervous system regulates the internal environment in
an involuntary manner.
<li> The   sympathetic  division  mediates  the  "fight-or-flight"
response to stress.
+ The  parasympathetic  division promotes a return to "rest and
digest" state.
+ The  enteric  division  controls  activity  of  the digestive
tract, pancreas, and gallbladder.
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