Question

question 10 of 10
which of the following cranial nerves does not have a parasympathetic component?
olfactory nerve
vagus
glossopharyngeal
oculomotor

Explanation:

To determine which cranial nerve lacks a parasympathetic component, we analyze each option:

• Olfactory nerve (CN I): It is responsible for the sense of smell (sensory function) and has no parasympathetic fibers.
• Vagus (CN X): It has a significant parasympathetic component, innervating many visceral organs.
• Glossopharyngeal (CN IX): Contains parasympathetic fibers that innervate structures like the parotid gland.
• Oculomotor (CN III): Has parasympathetic fibers that control pupil constriction and lens accommodation.

So, the Olfactory nerve is the one without a parasympathetic component.

Answer:

A. Olfactory nerve