INBDE (Integrated National Board Dental Examination) Practice Exam

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The motor end of the gag reflex is carried by which nerve?

The correct answer is: X

The gag reflex is a reflex contraction of the back of the throat, triggered by touching the soft palate. This reflex is carried by the vagus nerve, also known as cranial nerve X. The other options, including B VII, C: V, and D: IX, are all cranial nerves, but they are not responsible for carrying the motor end of the gag reflex. Option A: X is the correct answer because the vagus nerve carries both the motor and sensory components of the gag reflex, allowing it to transmit information to and from the brain. Therefore, option A is the most suitable answer.