Chemosensitive Cells in the Carotid Bodies and Aortic Bodies Are

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.

A) PCO₂ in your blood; decreased; negative
B) PO₂ in your blood; increased; negative
C) PCO₂ in the atmosphere; increased; positive
D) PO₂ in the atmosphere; increased; positive
E) H⁺ level in your blood; decreased; negative