In the Sodium-Hydrogen Antiport System

Multiple Choice

In the sodium-hydrogen antiport system,

A) both sodium ions and hydrogen ions are transported into the tubular lumen.
B) both sodium ions and hydrogen ions are transported into the tubular cell.
C) sodium ions are transported into the cell; hydrogen ions are transported out of the cell.
D) sodium ions are transported into the tubular lumen; hydrogen ions are transported into the cell.
E) sodium ions are transported out of the cell; hydrogen ions are transported into the cell.