Answer
The olfactory receptors are situated high in the nasal cavity in the superior olfactory mucosa
This is not the most advantageous site to detect odors because most of the air breathed in passes below that location --over the inferior olfactory epithelium.
Work Step by Step
Most of the olfactory receptors are located in the superior olfactory epithelium, It is a disadvantageous site because it is situated above the main current of inhaled air that passes over the inferior olfactory epithelium. That is why one has to sniff or pull in air strongly to get a good smell of faint odors.
