The inner lining of the stomach contains openings of the ducts from the glands. Those glands contain three types of cells, whose secretions together form gastric juice. Mucous cells secrete mucus. Parietal cells secrete hydrochloric acid (HCl). The third type of cells secrete pepsinogen. Both HCl and pepsin function in the chemical breakdown of proteins. Mucus in the stomach lining is a protective secretion that helps.

1.18: Enzyme Function

a student sets up an experiment to study the role of enzymes in digestion of food in test tube a he added egg albumin and pepsin in test tube b he added egg albumin pepsin and hcl in which t 93304

Understanding The Process of Protein Digestion

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