Hering-Breuer Inflation Reflex — FRCA Primary MCQ
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Correct answer: E — Inhibits inspiration when the lung is stretched preventing overinflation
The Hering-Breuer inflation reflex: pulmonary stretch receptors in bronchial smooth muscle are stimulated by lung inflation. Afferents travel via the vagus nerve to the medulla inhibiting further inspiration. It prevents overinflation. It is more important in neonates than in adults where it is only activated at large tidal volumes (>1 L).
Reference: Power Kam 2018 Principles of Physiology for the Anaesthetist