Hering-Breuer reflex

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The Hering-Breuer reflex is a reflex triggered to prevent overinflation of the lungs. Pulmonary stretch receptors present in the smooth muscle of the airways respond to excessive stretching of the lung during large inspirations.

Once activated, they send action potentials through afferent nerve fibre to the medulla oblongata, inhibiting the inspiratory neurons present there. This results in inhibiting inspiration, allowing expiration to occur.^[1]

^ Sherwood, Lauralee. "Ch13", in Peter Adams: Human physiology from cells to systems, 6th, Thomson Brooks/Cole. ISBN 0534568262 }.

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Respiratory system, physiology: respiratory physiology

Volumes:

lung volumes - vital capacity - functional residual capacity - respiratory minute volume - dead space - spirometry - body plethysmography - peak flow meter

ventilation (V) (positive pressure) breath (inhalation, exhalation) - respiratory rate - respirometer - pulmonary surfactant - compliance - hysteresivity - airway resistance

pulmonary circulation - perfusion (Q) - hypoxic pulmonary vasoconstriction - pulmonary shunt

ventilation/perfusion ratio (V/Q) and scan - zones of the lung - gas exchange - pulmonary gas pressures - alveolar gas equation - hemoglobin - oxygen-haemoglobin dissociation curve (2,3-DPG, Bohr effect, Haldane effect) - carbonic anhydrase (chloride shift) - oxyhemoglobin - respiratory quotient - arterial blood gas - diffusion capacity - Dlco

control of respiration: pons (pneumotaxic center, apneustic center) - medulla (dorsal respiratory group, ventral respiratory group) - chemoreceptors (central, peripheral) - pulmonary stretch receptors - Hering-Breuer reflex

high altitude - oxygen toxicity - hypoxia

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Category: Reflexes

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