P_CO2 is monitored carefully by the human body, and any changes in it lead quickly to changes in respiratory rate. The actual stimulus that leads to increased respiratory gas exchange is

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The primary stimulus for increased respiratory rate is a change in blood pH, which is influenced by P_CO2 levels. An increase in P_CO2 leads to a decrease in blood pH, triggering the respiratory centers to increase ventilation to expel more CO2 and restore pH balance.

PCO2 Is Monitored Carefully by the Human Body, and Any

P_CO2 Is Monitored Carefully by the Human Body, and Any