Question

How do we detect the smell of an agarbatti (incense stick)?

Answer 1

When the smell of the incense stick reaches our nose, the olfactory receptors detect it and send this information to the forebrain in the form of electrical signals via the sensory nerves. The forebrain interprets this information as the smell of an incense stick after it retrieves the data on the range of fragrances pre-stored from the cerebrum.