A. The upper respiratory tract is susceptible to many viral and bacterial infections because it

A. The upper respiratory tract is susceptible to many viral and bacterial infections because it functions to (Click to select) B. The common cold is an infection caused by a (Click to select) | and is characterized by sneezing, a runny nose, and a mild fever. C. Colds usually last from a few days to a week, and (Click to select) are not effective against the pathogens and symptoms of colds. D. Also as part of the upper respiratory tract, the (Click to select) |located in the posterior wall of the nasopharynx can get inflamed and enlarged when infected. E. When the (Click to select) v gets inflamed, the voice gets hoarse or even inaudible.

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