Question

The digestive juices in your stomach contain dilute hydrochloric acid which helps in digestion of proteins.However,hydrocholoric acid,as you know is a strong and dangerous acid. Find out why it does not damage the stomach?

Answer 1

Mucous-producing cells at the neck of the gastric pits create a layer of protective mucous covering the stomach lining. This mucous layer includes bicarbonate ions which act as a chemical barrier against the protons in gastric juice