Digestion 0.5% hydrochloric acid (HCl), which lowers the pH to the desired pH of 1-3. Acid release is also triggered by acetylcholine and histamine. The intestinal phase has two parts, the excitatory and the inhibitory. Partially digested food fills the duodenum. This triggers intestinal gastrin to be released. Enterogastric reflex inhibits vagal nuclei, activating sympathetic fibers causing the pyloric sphincter to tighten to prevent more food from entering, and inhibits local reflexes. Protein digestion occurs in the stomach and duodenum in which 3 main enzymes, pepsin secreted by the stomach and trypsin and chymotrypsin secreted by the pancreas, break down food
Break Down (album) Break Down (album) Break Down is the second studio album by Mandopop boy group Super Junior-M. It was released online on January 7, 2013 by S.M. Entertainment and distributed by KMP Holdings. It is their first release in nearly 2 years, since the release of their 2011 EP, "Perfection", and their first studio album in nearly 5 years, since the release of their first 2008 studio album, "Me". After their second EP "Perfection" released in 2011, the Korean members returned to their activities as part of the main group, Super Junior. The main group released their 5th album "Mr. Simple"