Final answer:
The chemoreceptors in the common carotid artery are located in the carotid sinus, which monitors levels of oxygen, carbon dioxide, and pH in the blood.
Step-by-step explanation:
The chemoreceptors in the common carotid artery are located in the carotid sinus, which is an expansion of the internal carotid artery. These chemoreceptors are responsible for monitoring levels of oxygen, carbon dioxide, and pH in the blood. They play a crucial role in maintaining cardiovascular and respiratory homeostasis.