The Nervous System - November 26

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9 Terms

1
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the nervous system can be divided into 2 parts:

  1. central nervous system (C.N.S)

  2. peripheral nervous system (P.N.S)

2
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what is the central nervous system?

brain and spinal cord

processes information

3
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what is the peripheral nervous system?

subsystem that contains all nerve pathways that communicate with CNS

(anything BUT the brain and spinal cord)

4
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what is the afferent system?

receives input through receptors and carries it to the CNS

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what is the efferent system?

carries signals from the CNS to effectors

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whats the somatic system? ex

carries instructions to voluntary muscles

ex skeletal

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whats the autonomic system?

carries info to involuntary muscles and glands

ex smooth muscles

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whats the parasympathetic division?

stimulates “relaxation” during times of low stress

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whats the sympathetic division?

stimulates “fight or flight” response during times of stress, danger, excitement or strenuous activity