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Nervous System (Peripheral Nervous System (Types of fibers (Somatic…

- - - - Ganglia
        
        Bulge with group of neuron cell bodies
        
        Not far from nerve roots
  - - - Signals from...
        
        Body wall
        
        Skin
        
        Limb
      - Hearing, equilibrium, vision
      - Proprioception
      - Touch, pressure, vibration
      - Pain, temperature
    - - Signals from viscera (ventral body cavity)
      - Taste, smell
      - Stretch, temperature, chemical changes
      - Irritation such as hunger or nausea
      - Pain (often unconscious)
    - - Motor innervation of skeletal muscle
    - - Motor innervation of...
        
        Smooth muscle
        
        Cardiac muscle
        
        Glands
  - - - Attach to neuron cell body
      - Structural support
      - Regulates material exchange
  - - - produce myelin sheath
- - - - Gray matter
        
        cortex, outer part of cerebrum
        
        Neuron cell bodies only
        
        No myelination, no axons
        
        Deep in brain too
      - White matter
        
        Both myelinated, unmyelinated axons
        
        Transmission of signals
        
        Deep to cortex
  - - - Skeletal muscle
      - Smooth muscle
      - Cardiac muscle
      - Glands (exocrine and endocrine)
  - - - Largest
      - Most abundant
      - Maintains chemical environment
        
        Sodium, potassium, calcium, chloride
        
        For transmission of electric signals
    - - Phagocyte
    - - CSF production, circulation
      - Both microvilli and cilia
  - - - produces myelin