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Which of the following statements accurately describes the effect of pH on the regulation of respiration?
An increase in pH leads to an increased respiration rate.
A decrease in pH leads to decreased respiration rate.
pH does not have any effect on the regulation of respiration.
Changes in pH primarily affect the depth of respiration.
Answers (1)
pH is important for regulating respiration. Blood pH reflects its acidity or alkalinity. Increased CO2 in the blood forms Carbonic acid through a reaction with water releasing hydrogen ions (H+) and bicarbonate ions (HCO3-) with the help of carbonic anhydrase enzyme. The concentration of hydrogen ions (H+) affects blood pH. More hydrogen ions (H+) lower pH, causing acidosis, while fewer hydrogen ions (H+) raise pH, causing alkalosis. pH changes impact respiration depth. In acidosis, respiration increases to remove excess CO2 reducing hydrogen ion concentration and restoring pH balance. In alkalosis, respiration decreases to retain CO2, increasing hydrogen ions and restoring pH balance.
Therefore, the correct answer is option 4.
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