<P> The main constituent of gastric acid is hydrochloric acid which is produced by parietal cells ( also called oxyntic cells ) in the gastric glands in the stomach . Its secretion is a complex and relatively energetically expensive process . Parietal cells contain an extensive secretory network ( called canaliculi ) from which the hydrochloric acid is secreted into the lumen of the stomach . The pH of gastric acid is 1.5 to 3.5 in the human stomach lumen , the acidity being maintained by the proton pump H / K ATPase . The parietal cell releases bicarbonate into the bloodstream in the process , which causes a temporary rise of pH in the blood , known as an alkaline tide . </P>
<P> The main constituent of gastric acid is hydrochloric acid which is produced by parietal cells ( also called oxyntic cells ) in the gastric glands in the stomach . Its secretion is a complex and relatively energetically expensive process . Parietal cells contain an extensive secretory network ( called canaliculi ) from which the hydrochloric acid is secreted into the lumen of the stomach . The pH of gastric acid is 1.5 to 3.5 in the human stomach lumen , the acidity being maintained by the proton pump H / K ATPase . The parietal cell releases bicarbonate into the bloodstream in the process , which causes a temporary rise of pH in the blood , known as an alkaline tide . </P>
where is hcl secreted in the digestive system
where is hcl secreted in the digestive system
the lumen of the stomach
the lumen of the stomach