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
Break Down Here vehicle to break down, and she does not want to break down and cry ("I've made it this far without crying a single tear"). A music video was released for the song, directed by Steven Goldmann. Kelefa Sanneh of "The New York Times" described the song favorably, calling it "one of the year's best country ballads" and "an aching but resolute lament". The following musicians performed on this track: "Break Down Here" spent a total of 32 weeks on the country charts, peaking at 18 in September 2004. It is Roberts' only Top 40 hit on that chart. The song