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Irritating adors set off alarms in nose?
Smells so irritating they make you cough or gag may act upon a single type of cell in the nose that senses caustic chemicals and warns the brain of potential danger, US researchers said recently. Scientists had thought such smells acted directly on nerve endings in the nose, but the study in mice suggests special cells in the tip of the nose act as air quality control sensors that protect the body from harmful chemicals.
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