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

Quizplus · Accepted Answer

Tubular epithelial cells secrete ammonia (NH3) to buffer excess H⁺ in the filtrate, forming ammonium ions (NH4+), which helps maintain acid-base balance.

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