Secretion of hydrogen ion by the PCT is by the process of
A) diffusion.
B) facilitated diffusion.
C) active transport.
D) cotransport.
E) countertransport.

Question

Quizplus · Accepted Answer

Hydrogen ions are secreted by the proximal convoluted tubule (PCT) through countertransport, specifically via the Na+/H+ exchanger, where sodium ions are reabsorbed while hydrogen ions are secreted into the tubular fluid.

Secretion of Hydrogen Ion by the PCT Is by the Process