INBDE (Integrated National Board Dental Examination) Practice Exam

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The aortic body, a small cluster of chemo and baroreceptors located along the aortic arch, is innervated by what?

Phrenic Nerve
Vagus Nerve
Trigeminal Nerve
Hypoglossal Nerve

The correct answer is: Vagus Nerve

The aortic body is a small cluster of chemo and baroreceptors located along the aortic arch, which is responsible for monitoring the blood pressure and oxygen levels in the body. The correct nerve that innervates this area is the vagus nerve, also known as the tenth cranial nerve. The phrenic nerve (A), trigeminal nerve (C), and hypoglossal nerve (D) are not innervating the aortic body and therefore, are incorrect options. The phrenic nerve controls the movement of the diaphragm, the trigeminal nerve provides sensation to the face and motor control to the muscles involved in chewing, and the hypoglossal nerve controls the movement of the tongue. These nerves are not responsible for monitoring the blood pressure and oxygen levels in the body, making them incorrect choices.