Alkaline mucus

Alkaline mucus is a thick fluid produced by animals which confers tissue protection in an acidic environment, such as in the stomach.

[3] Exposure to atmospheric air also tends to increase the pH level of alkaline mucus.

Alkaline mucus exists in the human eye, stomach, saliva, and cervix.

[6] Secretion of alkaline mucus is necessary to protect the mucous membrane of the stomach from acids released during digestion.

[7] Duodenal ulcers have been shown to develop in sites that are in direct contact with pepsin and acids.