Which nerve transmits afferent signals from the carotid body to the medulla?
A) IX cranial
B) X cranial
C) XI cranial
D) phrenic

Question

Quizplus · Accepted Answer

The IX cranial nerve, also known as the glossopharyngeal nerve, transmits afferent signals from the carotid body (a chemoreceptor located in the carotid artery) to the medulla. The X cranial nerve, also known as the vagus nerve, does have a role in regulating breathing and heart rate, but it does not directly transmit signals from the carotid body to the medulla. The XI cranial nerve, also known as the accessory nerve, is involved in motor function of the neck and shoulder muscles. The phrenic nerve is involved in controlling the diaphragm for breathing and is not directly related to the carotid body.

Which Nerve Transmits Afferent Signals from the Carotid Body to the Medulla