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.
Answers. Because there is so much salt in it, Dead Sea water is very dense compared with fresh water or ordinary sea water. And because less objects or surface floats in water. An example of it is a needle, tissue and a tap water.When you put the needle in the water it will sink because it is denser than the water, but when you use the tissue to let the needle float the density of the needle lesses, and it is called surface tension.hen you put the needle in the water it will sink because it is denser than the water, but when you use the tissue to let the needle float the density of the needle lesses, and it is called surface tension.