Final answer:
The treatments for excessive stomach-acid secretion target the parietal cells. Parietal cells produce hydrochloric acid (HCl) and intrinsic factor. HCl is responsible for the high acidity of the stomach contents and helps in protein digestion. Intrinsic factor is necessary for the absorption of vitamin B12.
Step-by-step explanation:
The treatments for excessive stomach-acid secretion target the parietal cells. Parietal cells produce hydrochloric acid (HCl), which is responsible for the high acidity of the stomach contents. The acidity of HCl helps in protein digestion, kills bacteria, and denatures proteins for easier digestion. In addition to HCl, parietal cells also produce intrinsic factor, which is necessary for the absorption of vitamin B12. So, targeting parietal cells is an effective way to control excessive stomach-acid secretion.