If the tubular filtrate becomes too acidic, which of the following is secreted by the tubular epithelial cells to buffer the secreted H⁺? A) HCO₃^- B) OH^- C) NH₃ D) NH₄⁺ E) basic phosphate

Question

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Ammonia (NH3) is secreted by the tubular epithelial cells to buffer the secreted H+ by forming ammonium ions (NH4+), which helps to maintain acid-base balance in the kidneys.

If the Tubular Filtrate Becomes Too Acidic, Which of the Following