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Question

Which of the following is not true about olfactory system?


A

Olfactory epithelium is in the middle of the place where your eyes sit in your skull.

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B

The olfactory bulbs are a pair of swellings above the olfactory epithelium.

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C

Olfactory bulb is a relay center for the information of smell.

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D

The olfactory epithelium has a mucous layer and therefore only non-water soluble odor molecules will be able to pass easily.

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Solution

The correct option is C

The olfactory epithelium has a mucous layer and therefore only non-water soluble odor molecules will be able to pass easily.


The olfactory epithelium involved in the first step of the sense of smell has a mucous layer covering the chemoreceptors. This mucous layer implies that only water-soluble odor molecules will be able to pass through it easily and activate the chemoreceptors involved in the sensation of smell.


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