15.2 Autonomic Nervous System

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6 Terms

1
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two parts of autonomic nervous system

  • parasympathetic

  • sympathetic

2
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parasympathetic division fxns

rest and digest

  • conserving energy

  • replenishing nutrients

3
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sympathetic divison fxns

fight or flight

  • exercise

  • excitement

  • emergency

4
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parasympathetic anatomy

  • craniosacral division

  • pre neurons in S2-S4 spinal cord

  • pre neurons are long with few branches and post are short

  • ganglia close or in effector

long pre axons with few branches = few effectors at a time

<ul><li><p>craniosacral division</p></li><li><p>pre neurons in S2-S4 spinal cord</p></li><li><p><strong>pre </strong>neurons are<strong> long with few branches</strong> and <strong>post </strong>are <strong>short</strong></p></li><li><p>ganglia close or in effector</p></li></ul><p></p><p><strong>long pre axons with few branches = few effectors at a time</strong></p>
5
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sympathetic anatomy

  • thoracolumbar division

  • preganglionic neurons in lateral horns of T1-L2

  • pre neurons are short with many branches and post are long

  • ganglia close to spinal cord

short pre axons with many branches = significant neuronal divergence and activation of many effectors simultaneously

<ul><li><p>thoracolumbar division</p></li><li><p>preganglionic neurons in lateral horns of T1-L2</p></li><li><p><strong>pre </strong>neurons are <strong>short with many branches</strong> and <strong>post </strong>are <strong>long</strong></p></li><li><p>ganglia close to spinal cord</p></li></ul><p></p><p><strong>short pre axons with many branches = significant neuronal divergence and activation of many effectors simultaneously</strong></p><p></p>
6
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mass activation

significant neuronal divergence and activation of many effectors simultaneously