The gastric mucosa secretes the inactive enzyme pepsinogen and hydrochloric acid (HCl). In the presence of HCl, the active enzyme pepsin is produced. Pepsin digests proteins into shorter polypeptides. The high concentration of HCl from the parietal cells makes gastric juice very acidic, with a pH of less than 2.he gastric mucosa secretes the inactive enzyme pepsinogen and hydrochloric acid (HCl). In the presence of HCl, the active enzyme pepsin is produced. Pepsin digests proteins into shorter polypeptides. The high concentration of HCl from the parietal cells makes gastric juice very acidic, with a pH of less than 2.
Coral reef. Coral reef, ridge or hummock formed in shallow ocean areas by algae and the calcareous skeletons of certain coelenterates, of which coral polyps are the most important. A coral reef may grow into a permanent coral island.
The reef in Belize is approximately 185 miles long (300 kilometers). The Belize Barrier Reef includes numerous features of coastal geology, such as barrier reefs, fringing reefs, sand cays, mangrove cays, lagoons, and estuaries.The reef is home to three coral atolls, named Lighthouse Reef, Glover's Reef, and the Turneffe Islands.he reef in Belize is approximately 185 miles long (300 kilometers). The Belize Barrier Reef includes numerous features of coastal geology, such as barrier reefs, fringing reefs, sand cays, mangrove cays, lagoons, and estuaries.