You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Intrinsic factor is secreted by: and explain in detail?
Ans: A (Parietal cells) Ref: Guyton & Hall, Gastric Secretion, In: Textbook of Medical Physiology, 12th ed, Philadelphia, Saunders, Elsevier 2012, p 777Explanation:* Stomach mucosa has 2 types of tubular glands1. Oxvntic glands (Gastric glands)- secrete hydrochloric acid, pepsinogen, intrinsic factor and mucus.2. Pyloric glands - mucus for protection of the pyloric mucosa from the stomach acid; also secrete the hormone gastrin.Stomach oxyntic gland is composed of three types of cells:1. Mucous neck cells - secrete mainly mucus2. Peptic (or chief) cells - secrete large quantities of pepsinogen3. Parietal (or oxyntic) cells - secrete hydrochloric acid and intrinsic factor {See figure on the next page)Structure of Gastric Glands and Cell Types