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When you hold your breath, which of the following blood gas changes first leads to the urge to breathe?

When you hold your breath, which of the following blood gas changes first leads to the urge to breathe?

جب آپ اپنی سانس روکتے ہیں، تو درج ذیل میں سے کون سی خون کی گیس کی تبدیلی سب سے پہلے سانس لینے کی خواہش کا باعث بنتی ہے؟
Explanation
  • The primary trigger for the urge to breathe is an increase in carbon dioxide (CO2) levels in the blood.
  • Rising CO2 leads to higher acidity (lower pH).
  • It stimulates the respiratory centers in the brain.