What Triggers the Process of the Sense of Smell

question 28

Multiple Choice

What triggers the process of the sense of smell?

• A) Odor molecules entering the nasal cavity bind to cilia projecting from the ends of olfactory receptor cells.
• B) Chemicals in saliva trigger receptors for the olfactory nerve.
• C) Odor molecules entering the nasal cavity excite the olfactory bulbs under the brain's frontal lobe.
• D) Chemicals in saliva stimulate nerve fibers in the soft palate, which, in turn, synapse with neurons in the olfactory bulbs.

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