The parietal or oxcyntic cells secrete hydrochloric acid; the peptic or chief cells secrete pepsinogen; the mucous cells secrete a bicarbonate rich mucous; and the G cells (found only in the antral glands) secrete the hormone Gastrin.he parietal or oxcyntic cells secrete hydrochloric acid; the peptic or chief cells secrete pepsinogen; the mucous cells secrete a bicarbonate rich mucous; and the G cells (found only in the antral glands) secrete the hormone Gastrin.
What to Expect at the Reeperbahn. The Reeperbahn is the most famous street in Hamburg; you'll find many great bars, restaurants, theatres, and clubs here, along with sex shops, sex museums, erotic theaters, and strip clubs. The Reeperbahn doesn't come to life before the evening hours; a good time to visit is around 8 or 9 p.m. 2  It gets very crowded on the weekends; the area is safe thanks to the high police presence, but you should still be cautious and beware of pickpockets.
Paris RER trains use two different types of tickets depending on which part of the RER network you will be traveling. When taking a RER train strictly within central Paris Zone 1 (visible in the first RER Map), you can use basic Paris Metro tickets for travel on the RER.Travel beyond Paris Zone 1 on the RER requires a special ticket: a Billet Ile-de-France.aris RER travel passes are subject to fare zones, 1 through 5, which determine the price of the multi-use pass or ticket. The above transit fares are valid for travel not only on the RER, but also on the Metro and Buses within the fare zone you have purchased.