Question

Chemosensitive cells in the carotid bodies and aortic bodies are sensitive to the _______. when this falls, signals are sent to the medulla and cause a(n) _______ ventilation rate. this represents a _______ feedback control of breathing.

Answer 1

Carotid and Aortic bodies refer to the compositions of cells situated on the common carotid artery and the aortic arch, correspondingly. These peripheral chemoreceptors comprise of glia-like type II and type I glomus cells.

The chemoreceptor cells in the aortic bodies and carotid bodies are sensitive to the partial pressure of oxygen in the blood. When it falls, the signals are transmitted to the medulla leads to increased ventilation rate. This signifies a negative feedback control of breathing.