Question

multiple choice question
what are the effectors of the motor fibers of the facial nerve?
○ muscles of tongue and pharynx; swallowing muscles
○ certain external muscles of the eyes; eyelids
○ salivary glands and tear glands; muscles of facial expression
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Explanation:

The facial nerve (CN VII) has motor fibers that innervate the muscles of facial expression (somatic motor) and also has parasympathetic fibers that innervate salivary glands (submandibular, sublingual) and tear (lacrimal) glands. The first option's muscles are innervated by other nerves (e.g., glossopharyngeal, vagus for pharyngeal muscles; hypoglossal for tongue muscles). The second option's eye muscles are innervated by oculomotor, trochlear, or abducens nerves.

Answer:

Salivary glands and tear glands; muscles of facial expression