Which structure is involved in the sense of smell?

Which structure is involved in the sense of smell?

• A. Nasal cavity
• B. Turbinates
• C. Olfactory mucosa
• D. Pharynx

Answer: (C)

The olfactory mucosa is the specialized tissue responsible for the sense of smell. It is located in the upper region of the nasal cavity and contains olfactory receptor neurons, which are essential for detecting odor molecules in the air. When airborne odorants enter the nasal cavity, they dissolve in the mucus of the olfactory mucosa, where they can interact with the receptors. This interaction generates nerve impulses that are transmitted to the brain, leading to the perception of smell.

While the nasal cavity serves as the overall space where air and smells are processed, and the turbinates help to warm and humidify the air entering the nasal cavity, they do not directly detect smells. The pharynx, on the other hand, is part of the throat involved in both the respiratory and digestive tracts but is not directly related to the olfactory process. Thus, the olfactory mucosa stands out as the primary structure for sensing smell.