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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Definitions:

Endocrine

Pertaining to glands that secrete hormones directly into the blood rather than through a duct, regulating various bodily functions.

Integumentary

Relating to the skin and its appendages, which serve as the body's largest organ and first line of defense against environmental hazards.

Skeletal

Relating to or functioning as a part of the skeleton, the internal framework of the body composed of bones and cartilage.

Immediate Responses

Quick reactions or adaptations by an organism or system immediately following a stimulus or change in the environment.