Mark Spitz, who set a standard for Olympic excellence by winning all of his seven events in world-record fashion at the Munich 1972 Games, attended neither the Beijing 2008 Olympics nor the London 2012 Olympics.And heâs not certain he will be at the Rio 2016 Olympics.ark Spitz, who set a standard for Olympic excellence by winning all of his seven events in world-record fashion at the Munich 1972 Games, attended neither the Beijing 2008 Olympics nor the London 2012 Olympics. And heâs not certain he will be at the Rio 2016 Olympics.
The stomach contains hydrochloric acid, which has a pH of generally 1-3.   These optimal pH levels must be present in order for pepsin (a protein-digesting enzyme) to functâ¦ion. If the pH is not acidic, pepsin will only be present in its inactive form, pepsinogen, and protein digestion will effectively occur.   Uhh.. hope that's what you were looking for. The second part is just a bit more detail as to why the pH of stomach is important.
Pure stomach acid has a pH of 1.8 when it first enters the stomach, but is quickly diluted in the presence of food. Regardless, plant enzymes are not destroyed by the highly acidic environment of the stomach.