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Our sense of smell is activated by ________.
a) The thalamus
b) Odorant molecules
c) Reactions caused by our sense of smell in the sinus cavities.

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peacemonk

Answer:

b) Odorant molecules

Explanation:

Odorant molecules are particles that enter the nasal cavity and interact with the olfactory receptors, this interaction triggers a signal that travels to the brain leading to our perception of smell.

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