Solved UPSC CDS/OTA Question
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Q · Respiratory System medium · 45s
Which receptors primarily detect changes in blood PCO₂ and pH?
TopicRespiratory System
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
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Central chemoreceptors in the ventrolateral medulla respond to changes in cerebrospinal fluid pH (reflecting PaCO₂) and modulate ventilation to regulate arterial CO₂ levels and acid–base balance.
Final Answer: Option B - Central chemoreceptors in medulla