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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Intrinsic factor is produced by
assistant
The correct answer is  The gastric mucosa contains many deep glands. In the cardia and the pyloric region, the glands secrete mucus. In the body of the stomach, including the fundus, the glands also contain parietal (oxyntic) cells, which secrete hydrochloric acid and intrinsic factor, and chief (zymogen, peptic) cells, which secrete pepsinogens. These secretions mix with mucus secreted by the cells in the necks of the glands. Several of the glands open on a common chamber (gastric pit) that opens in turn on the surface of the mucosa. Mucus is also secreted along with HCO3 by mucus cells on the surface of the epithelium between glands.REF: GANONG&;S REVIEW OF MEDICAL PHYSIOLOGY, KIM BARRETT, HEDDWEN BROOKS, SCOTT BOITANO, SUSAN BARMANTWENTY THIRD EDITIONPAGE NO:431,432