The kidneys secrete additional H⁺ and conserve HCO₃⁻ to compensate for increased H⁺ concentration in the body fluids.

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This is true. Kidneys play a major role in balancing the pH of the body fluids by secreting excess hydrogen ions (H⁺) and retaining bicarbonate ions (HCO₃⁻) to compensate for the increased concentration of H⁺ in the body fluids. This process is called renal regulation of acid-base balance.

The Kidneys Secrete Additional H⁺ and Conserve HCO₃⁻ to Compensate