Question

when traveling to the brain a sensory message of smell travels on the _______.
olfactory canal olfactory bulb
olfactory nerve nasal cavity

Explanation:

To determine the correct answer, we analyze the role of each structure in the olfactory (smell) pathway:

• Olfactory Canal: Not a standard term for transmitting smell signals to the brain.
• Olfactory Bulb: A structure that processes smell information but is not the direct pathway for the sensory message to travel to the brain.
• Olfactory Nerve: The cranial nerve (cranial nerve I) responsible for carrying olfactory (smell) sensory information from the nasal receptors to the brain.
• Nasal Cavity: The location where smell receptors are present, but it is not the structure that transmits the signal to the brain.

Thus, the sensory message of smell travels to the brain via the Olfactory Nerve.

Answer:

C. Olfactory Nerve