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The hormone gastrin and the vagus nerve trigger the release of both pepsinogen and HCl from the stomach lining when food is ingested. Hydrochloric acid creates an acidic environment, which allows pepsinogen to unfold and cleave itself in an autocatalytic fashion, thereby generating pepsin (the active form). Pepsin cleaves the 44 amino acids ...
It is produced in the stomach by gastric chief cells in its inactive form pepsinogen, which is a zymogen. Pepsinogen is then activated by the stomach acid into its active form, pepsin. Pepsin breaks down the protein in the food into smaller particles, such as peptide fragments and amino acids.
n/a Ensembl ENSG00000229859 n/a UniProt P0DJD8 n/a RefSeq (mRNA) NM_001079807 n/a RefSeq (protein) NP_001073275 n/a Location (UCSC) Chr 11: 61.2 – 61.21 Mb n/a PubMed search n/a Wikidata View/Edit Human Pepsinogen 3, group I (pepsinogen A) is a protein that in humans is encoded by the PGA3 gene. Function This gene encodes a protein precursor of the digestive enzyme pepsin, a member of the ...
Here, the food is further broken down by mixing with gastric acid until it passes into the duodenum, the first part of the small intestine. The third stage, the intestinal phase, begins in the duodenum. Here, the partially digested food is mixed with a number of enzymes produced by the pancreas.
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The oxyntic gland contains the parietal cells that produce hydrochloric acid and intrinsic factor, and chief cells that produce pepsinogen and gastric lipase. The pyloric gland is found in the pyloric region, the remaining 20 per cent of the stomach. The pyloric glands are mainly in the pyloric antrum. The pyloric gland secretes gastrin from ...
Really, the bad-for-you-foods we imagine when we think about food processing are actually ultra-processed foods such as frozen pizza, potato chips, ready-made meals, and cookies.
Digestion is the breakdown of large insoluble food compounds into small water-soluble components so that they can be absorbed into the blood plasma.In certain organisms, these smaller substances are absorbed through the small intestine into the blood stream.