Stomach
Biology
Level
pending
As all you all might know our stomach has a gastric acid for digestion of food, killing of all the impurities that might reach the stomach and affect our immunity. Now the pH is about 1-2 . If the pH is this strong , then how the stomach does not get consumed with all the food?
Because stomach also release some bases which neutralize the acid and protect the stomach walls
Because of the immunity cells.
Beacuse of the mucus layer present on the inner wall of stomach.
Because the stomch tissues are stronger than rest of the body.
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REASONS:For one thing, mucus secreted by cells in gastric glands protects against self-digestion . In addition, cell division adds a new epithelial layer every three days, replacing cells before they are fully eroded by digestive juices. Under certain circumstances, however, damaged areas of the stomach lining called gastric ulcers can appear. It had been thought that they were caused by psychological stress and resulting excess acid secretion. However, Australian researchers Barry Marshall and Robin Warren discovered that infection by the acid-tolerant bacterium Helicobacter pylori causes ulcers. They also demonstrated that an antibiotic could cure most gastric ulcers. For these findings, they were awarded the Nobel Prize in 2005. REFERENCE: Campbell"s Biology