The inefficiency of gastric acid secretion.
D000818:Animals; D001001:Anura; D004285:Dogs; D004847:Epithelial Cells; D004848:Epithelium / Q000502:physiology; D005750:Gastric Juice / Q000378:metabolism / Q000502:physiology*; D005753:Gastric Mucosa / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D066298:In Vitro Techniques; D051381:Rats; D013045:Species Specificity