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sympathetic autonomic nervous system |
Also found in: Acronyms | 0.01 sec. |
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sympathetic autonomic nervous system,
n that part of the involuntary nervous system that balances the parasympathetic nervous system, increasing heart rate, pupil dilation, blood flow to skeletal muscles, and alertness. Also called fight or flight. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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