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Why do irritant receptors cause coughing and rapid shallow breathing?
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human respiratory system
The lungs serve as the gas-exchanging organ for the process of respiration.
Irritant receptors serve as a vital defense mechanism for the human respiratory system. When these receptors are stimulated by noxious materials in the atmosphere, they trigger specific physiological responses to protect the lungs.1
The primary function of these responses is to inhibit the penetration of injurious agents into the bronchial tree. The mechanisms include:1
- Rapid shallow breathing: This response limits the depth of inhalation, thereby preventing harmful substances from traveling deeper into the respiratory system.1
- Airway constriction: This further restricts the passage of irritants.1
- Coughing: This reflex acts to physically expel foreign particles or irritants from the airways.1
These receptors are supplied by the vagus nerve, which transmits signals to the brain to coordinate these protective actions.1