Hydrochloric acid enzyme pepsin by self-cleavage. After leaving the stomach, the hydrochloric acid of the chyme is neutralized in the duodenum by sodium bicarbonate. The stomach itself is protected from the strong acid by the secretion of a thick mucus layer, and by secretin induced buffering with sodium bicarbonate. Heartburn or peptic ulcers can develop when these mechanisms fail. Drugs of the antihistaminic and proton pump inhibitor classes can inhibit the production of acid in the stomach, and antacids are used to neutralize excessive existing acid. Concentrated hydrochloric acid (fuming hydrochloric acid) forms acidic mists. Both the mist and the solution have
God Break Down the Door which he had sporadically played for 20 years. In addition to the saxophone, the song prominently features what is described as a "frantic drumbeat", and has been described by critics as jazz fusion, electro-jazz, and trip hop. Reznor described the writing of the song, stating "Pitchfork" named the song "Best New Track", comparing it to the works of "Outside"-era David Bowie, stating "While the reference points are immediately obvious, the impact of "God Break Down the Door" is in just how different it sounds for Reznor. And it's not only his voice. There's a new energy in the arrangement: a