有关“胃粘膜屏障”的实质,尚未完全弄清。过去认为,屏障一词是指浸于胃液中的胃粘膜并不发生自身消化的意思。而今一般认为,它是指胃粘膜的一种特性,即通过胃粘膜的电解质,特别是氢离子(H~+),胃粘膜不准许它们随意来回移动。也就是说,已分泌到胃腔内的H~+,胃粘膜基本上不再吸收,因而才维持了胃腔内较低的pH值。当然,胃粘膜屏障也并 The essence of the “gastric mucosal barrier” has not yet been fully understood. In the past that the word barrier refers to the gastric mucosa immersed in gastric juice and does not mean that their own digestion. Today, it is generally believed that it refers to a characteristic gastric mucosa, that is, through the electrolyte of the gastric mucosa, especially hydrogen ions (H ~ +), gastric mucosa does not allow them to freely move back and forth. In other words, has been secreted into the gastric cavity H ~ +, gastric mucosa is basically no longer absorbed, thus maintaining a lower gastric cavity pH. Of course, the gastric mucosal barrier also