Gastric acid network (called canaliculi) from which the hydrochloric acid is secreted into the lumen of the stomach. The pH of gastric acid is 1.5 to 3.5 in the human stomach lumen, the acidity being maintained by the proton pump H/K ATPase. The parietal cell releases bicarbonate into the bloodstream in the process, which causes a temporary rise of pH in the blood, known as an alkaline tide. The highly acidic environment in the stomach lumen causes proteins from food to lose their characteristic folded structure (or denature). This exposes the protein's peptide bonds. The gastric chief cells of the stomach secrete
Shut Down (Prison Break) Shut Down (Prison Break) "Shut Down" is the 60th episode of the American television series "Prison Break" and was broadcast on September 8, 2008 in the United States on the Fox Network. Jodi Lyn O'Keefe does not appear in this episode. After learning that they have five more cards to track down, Michael Scofield confronts Don Self about the news. Self swears that he knows nothing about the five other cards, and orders him to track the next one by the end of the day, or they will return to prison. Michael has no choice but to find the second