The Hering-Breuer reflex is responsible for:
Initiating inspiration
Initiating expiration
Preventing overinflation of the lungs
Increasing lung compliance
The Hering-Breuer reflex, named after Josef Hering and Otto Breuer, regulates lung inflation and deflation. Stretch receptors in the airway smooth muscles and lung tissues trigger this reflex when the lungs stretch excessively. These receptors send signals to the medulla oblongata in the brainstem, initiating the reflex. The Hering-Breuer reflex inhibits respiration to prevent overinflation of the lungs, maintaining appropriate lung volume and protecting lung tissues from damage. In summary, it prevents further inspiration when the lungs are excessively stretched.
Hence, the correct answer is option 3.