Secretory cells are found in a group, or acinus (plural, acini). Keep dogs alive till acini degenerate leaving islets. Keep dogs alive till acini degenerate leaving Islets. Development of the exocrine acini progresses through three successive stages. Acini di pepe work well in soups and cold salads. The cells that do this are arranged in clusters called "acini". Growth of the submandibular gland continues after birth with the formation of more acini. PAC is expressed in the adrenal medulla, pancreatic acini, uterus, myenteric plexus and brain. Acini di pepe are often used in Italian wedding soup. The gland has usually a number of acini connected in a tiny lobule. The resulting increased blood flow to the acini allows the production of more saliva. The rounded terminal ends of the cords form the acini of the glands. Lung alveoli are found in the acini at the beginning of the respiratory zone. This response then results in acini destruction and the formation of epimyoepithelial islands. The rounded terminal ends of the cords form acini.