Description Gastric acid is produced by parietal cells (also known as oxyntic cells) in the stomach. Its secretion is a complex and energetically expensive process. Parietal cells contain an extensive secretory network (called canaliculi) from which the gastric acid is secreted into the lumen of the stomach. These cells are part of epithelial fundic glands in the gastric mucosa. The pH of gastric acid is 2-3 in the stomach lumen, the acidity being maintained by the proton pump, a H+/K+ ATPase. The parietal cell releases bicarbonate into the blood stream in the process, which causes the temporary rise of pH in the blood, known as alkaline tide.The resulting 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 acid also activates pepsinogen into pepsin - this enzyme then helps digestion by breaking the bonds linking amino acids, a process known as proteolysis. . In addition, many bacteria cannot survive in such an acidic environment, preventing bacteria found in foods from infecting the body.
John Bolin, Halmstad Member Since August 2007 Artist Statement Hello there.
My name is John I´m 32 years old and i live in Sweden.
There are too much to be told but i will give it a try.
I have sailed the seven seas on a Trampliner, I´ve slept in the Taj Mahal, climbed mountains in Kathmandu, made love to a beautiful woman amongst the statues of Easter island and watched the stars rise over Machu Picchu.
I´m both great and not, smart and dumb, a great lover and a greater lover.