83. Digestion in the stomach e Gastric juice its secretion k Nature Compositions functions pH 0.9-1.5, colorless, 1.5-2.5 L/day Hydrochloric acid (HCl) Secreted by parietal cells Basic secretion: 0.5 mmol/h Max secretion: 20-25 mmol/h Mechanism of hcl secretion Functions: see next page§ 3. Digestion in the stomach • Gastric juice & its secretion * Nature, Compositions & functions pH 0.9~1.5, colorless, 1.5~2.5 L/day Hydrochloric acid (HCl) Secreted by parietal cells Basic secretion: 0~5 mmol/h Max secretion: 20~25 mmol/h Mechanism of HCl secretion Functions: see next page