There's Life After Radiation for Brain Cells. Johns Hopkins researchers suggest neural stem cells may regenerate after anti-cancer treatment. Release Date: August 12, 2013. Scientists have long believed that healthy brain cells, once damaged by radiation designed to kill brain tumors, cannot regenerate.
The key player in acid secretion is a H+/K+ ATPase or proton pump located in the cannalicular membrane. 1  This ATPase is magnesium-dependent, and not inhibitable by ouabain. The current model for explaining acid secretion is as follows: 2  Hydrogen ions are generated within the parietal cell from dissociation of water.
They are different, however, in how they do this. While PPIs shut down the proton pumps in the stomach, H2 Blockers work by blocking the histamine receptors in acid-producing cells in the stomach. Proton Pump Inhibitors (PPIs) The proton pump is a molecule in certain cells of the stomach. It pumps acid into the stomach. It takes a non-acidic potassium ion out of the stomach and replaces it with an acidic hydrogen ion. This hydrogen ion is what makes things acidic.