Question

Which of the following is true about the olfactory system?

• A. The olfactory epithelium is present inside our eyes
• B. The olfactory bulbs are a pair of swellings that are located inside the mouth
• C. The olfactory bulb is a relay centre for the information regarding a taste
• D. The olfactory epithelium has a mucous layer so, only water-soluble odour molecules will pass through.

Answer 1

The correct option is D

The olfactory epithelium has a mucous layer so, only water-soluble odour molecules will pass through.

The olfactory epithelium is involved in the first step of the sense of smell. It has a mucous layer covering the chemoreceptors. This mucous layer makes sure that only water-soluble odour molecules are able to pass through it easily and activate the chemoreceptors that are involved in the sensation of smell.