When a leaf of fresh sage or mint is rubbed ,the fragrance is immediately obvious. Write a theoretical explanation for this observation

Volatile compounds present in the fresh sage leaf or mint leaf evaporate on rubbing.

Explanation:

When fresh sage or mint is rubbed on the skin or any other surface the volatile chemicals associated with the integral structure of the plant part get evaporated in the surrounding air and the vapors can be detected by the olfactory receptors present in the nose. These receptors take the smell or fragrance stimulus and generate impulses or signals which goes to brain and brain interprets the smell or fragrance.

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