the respiratory centre in brain is stimulated by

1. CO₂ concentration in venous blood
2. O₂ concentration in airterial blood
3. CO₂ concentration in arterial blood
4. O₂ concentration in venous blood

In healthy individuals the presence of elevatedcarbon dioxidelevels in the arterial blood is the stimulant that the RC responds to in order to signal the respiratory muscles to breathe. Chemoreceptors found incarotid bodiesandaortic bodiesare responsible for detecting decrease in bloodpHby this carbon dioxide.

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Apoorva Arora

IIT Roorkee

askIITians Faculty