Ritchie Valens. Richard Steven Valenzuela (May 13, 1941 â February 3, 1959), known as Ritchie Valens, was an American singer, songwriter, and guitarist. A rock & roll pioneer and a forefather of the Chicano rock movement, Valens' recording career lasted eight months, as it abruptly ended when he died in a plane crash.
Why do enzymes in our stomach work best at a pH of 7? Actually the pH of the stomach very acid relative to pH 7 (between pH 1-4). An acidic stomach is optimal for the breaking of hydrogen bonds that makes up the complex compoundsâ¦ in the food we ingest, like proteins.
The enzymes in the small intestine work best in alkaline conditions (low acidity), but the food is still very acidic after being in the stomach. A substance called bile neutra â¦ lises the acid in the small intestine to provide the alkaline conditions needed for the enzymes to work best. 10 people found this useful.