Which nerves contribute to the gag reflex?

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Multiple Choice

Which nerves contribute to the gag reflex?

Gag reflex has two parts: a sensory input and a motor output. The sensory path comes from the oropharynx through the glossopharyngeal nerve (IX), detecting touch or irritation. The motor response is carried by the vagus nerve (X), which drives the pharyngeal muscles to produce the gag. So the glossopharyngeal nerve provides the sensory side, and the vagus nerve provides the motor side. The other nerves don’t fit this reflex arc: trigeminal isn’t responsible for the reflex’s motor effect, the facial nerve doesn’t drive the gag response, and the vagus doesn’t supply the sensory input for this reflex. The correct pairing is IX for sensory and X for motor.

Gag reflex has two parts: a sensory input and a motor output. The sensory path comes from the oropharynx through the glossopharyngeal nerve (IX), detecting touch or irritation. The motor response is carried by the vagus nerve (X), which drives the pharyngeal muscles to produce the gag. So the glossopharyngeal nerve provides the sensory side, and the vagus nerve provides the motor side. The other nerves don’t fit this reflex arc: trigeminal isn’t responsible for the reflex’s motor effect, the facial nerve doesn’t drive the gag response, and the vagus doesn’t supply the sensory input for this reflex. The correct pairing is IX for sensory and X for motor.

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