Considering the role of the chemoreceptor in the regulation of the respiration rate, the most important stimulus that induces changes in ventilation is:

A) partial pressure of oxygen (PO2 ) in pulmonary capillaries.
B) partial pressure of oxygen (PO2 ) in systemic capillaries.
C) partial pressure of carbon dioxide (PCO2 ) in arterial blood.
D) partial pressure of oxygen (PO2 ) in venous blood.


Answer: C

Anatomy & Physiology

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