Innervation of Airways

• Innervation of the Airways:

  • Airways innervated by autonomic NS
  • PNS innervates bronchial smooth muscle
  • Bronchoconstriction
  • Decrease airway calibre
  • SNS receptors sited in airway walls
  • Responsive to catecholamines
  • Increase airway calibre
  • In health airways resistance is low due to balance of ANS output
• Innervation of the Airways - PNS:

  • innervates bronchial smooth muscle
  • Bronchoconstriction
  • Decrease airway calibre
• Innervation of the Airways - SNS:

  • receptors sited in airway walls
  • Responsive to catecholamines
  • Increase airway calibre
• Innervation of the Airways:

  • In health airways resistance is low due to balance of ANS output