Each of the following statements regarding the gag reflex is correct except one. Which one is the exception?
◦ Mucus and saliva in the nasopharynx minimize the gag reflex.
◦ A gag reflex may be a response to physical stimuli.
◦ Some patients have a heightened gag reflex due to chronic sinus problems.
◦ A gag reflex may originate in the mind.