Final answer:
The other name for the facial nerve is cranial nerve VII, and it innervates muscles such as the orbicularis oculi and zygomaticus, which are crucial for facial expressions. Option c) Facial nerve; Orbicularis oculi and Zygomaticus correctly identifies the facial nerve and the muscles it innervates. The vagus nerve is responsible for the gag reflex, not the facial nerve.
Step-by-step explanation:
The other name for the facial nerve is cranial nerve VII, and it is responsible for innervating the muscles that control facial expressions. From the options provided, c) Facial nerve; Orbicularis oculi and Zygomaticus is the correct answer. The facial nerve innervates various facial muscles, including the orbicularis oculi muscle, which allows for the closing of the eyes, and the zygomaticus muscle, which helps in smiling by elevating the corners of the mouth. None of the other nerves listed or muscles are related to the facial nerve's functions in facial expressions.
In relation to controlling the gag reflex, however, the nerve responsible is not the facial nerve but the vagus nerve, which is cranial nerve X. The gag reflex tests the function of the vagus nerve, as it controls the motor functions of the gag through fibers in the superior pharynx.