1) Nasal congestion can affect the sense of taste

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1) Nasal congestion can affect the sense of taste. You may have experienced this with a bad cold or severe allergies. Why do you think congestion impairs the sense of taste?

2.   There are many medical conditions that can cause dry mouth. Individuals with dry mouth often experience an impaired ability to taste food. Why do you think dry mouth impairs the sense of taste?

3.   Parosmia describes a condition in which the sense of smell is distorted. Individuals with parosmia experience olfactory hallucinations or phantom smells, where they detect odors that are not truly present. Parosmia has been reported in some COVID-19 patients. What do you imagine could go wrong along the olfactory sensory transduction pathway that might explain these olfactory hallucinations? (HINT: There are many possible answers here.)