<prompt> The efferent limb of the gag reflex is?Facial nerveGlossopharyngeal nerveTrigeminal nerveVagal nerve  <response>: The gag reflex involves a brisk and brief elevation of the soft palate and bilateral contraction of pharyngeal muscles evoked by touching the posterior pharyngeal wall The vagus nerve CN X provides the efferent limb of the gag reflex muscles of the soft palate. The glossopharyngeal nerve provides the afferent limb of the gag reflex. 