Breathing and Exchange of GasesHard
Question
Respiratory centre of brain is stimulated by
Options
A.Carbon dioxide content in venous blood
B.Carbon dioxide content in arterial blood
C.Oxygen content in venous blood
D.Oxygen content in arterial blood
Solution
In healthy individuals the presence of elevated carbon dioxide levels in the blood is the stimulant that the RC responds to in order to signal the respiratory muscles to breathe. Chemoreceptors found in carotid bodies and aortic bodies are responsible for detecting decrease in blood pH by this carbon dioxide.
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