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Nervous System - Online Papers

Nervous System

The two major subdivisions of the are the
central and the peripheral .
The CNS consists of the brain and the spinal cord, it's
responsible for integrating, processing, and coordinating
sensory data and motor commands. The CNS integrates balance
and limb position and coordinates your recovery by
commanding the appropriate skeletal muscles. The CNS is
also the seat of higher learning, performing functions as
intelligence, memory, learning, and emotion.
The PNS includes all the neural tissue outside the CNS. The
PNS carries motor commands to the peripheral tissues and
systems. Nerve fibers called axons carry sensory
information and motor commands in the PNS.
Sketch and ...

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the
presynaptic cell to the posisynaptic cell.
Structural Classification
*Anaxonic neurons- have multiple processes and the axon is
indistinguishable from the
from the dendrites. They're fairly small.
*Bipolar neurons- have two processes in which one is a
dendrite, and the other an axon.
The dendrite is distinguishable from it's extensive
branching at it's distal end. it's less than 3Omm from tip
to tip.
*Unipolar neurons- have a continuous dendritic and axonal
process, in which case the cell body lies off to the side.
The dendritic end of the process has extensive branching,
the anoxic part of the process may extend to be a meter or
more.
*Multipolar neurons- have dendrites around the soma and the
axon is distinguishable from it's long length.
Functional Classification
*Sensory neurons- deliver information from the sensory
receptors to the CNS. Consists of somatic sensory neurons
that monitor the outside world and our position in it, and
...

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PAPER DETAILS

Added: 10/23/2005 12:55:13 AM
Category: Science & Nature
Type: Free Paper
Words: 514
Pages: 2

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