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The tongue papillae, including the taste buds, can become inflamed. A sore tongue is not always a sign of something more serious. The tongue should be included in good dental health habits. Over time, smoking can make the tongue more sensitive to heat and cold.
The gag reflex, in contrast, is a good example of a true reflex. It is triggered whenever a noxious substance touches the back of the tongue, back of the pharynx, or soft palate. The swallow response, on the other hand, cannot be initiated by touching any particular area in the oral cavity. The gag reflex and the swallow response also differ in terms of neurological control.