Every drop of stomach acid is pumped by one cell — the parietal cell. The three big acid-lowering drug classes each strike a different spot: the pump itself, a receptor on its surface, or the acid already spilled into the stomach. Tap a class (or tap the cell) to see where it acts and what it means at the bedside.
The parietal cell
Acid in the stomach
H⁺ (acid)Proton pumpReceptorsParietal cell
Tip: the pump, the H₂ receptor, and the lumen are all tappable.