The stomach contains hydrochloric acid and digestive enzymes.<\/p>\n\n\n\n
Why doesn\u2019t the stomach digest itself?.<\/p>\n\n\n\n
A.
The stomach wall is not composed<\/p>\n\n\n\n
B.
The stomach wall is protected by large amounts of mucus.<\/p>\n\n\n\n
C.
The digestive enzymes in the stomach are not strong enough.<\/p>\n\n\n\n
D.
The rugae lining of the stomach is too tough to be attacked by digestive enzymes.<\/p>\n\n\n\n
The correct answer and Explanation is :<\/strong><\/mark><\/p>\n\n\n\n The correct answer is B. The stomach wall is protected by large amounts of mucus.<\/strong><\/p>\n\n\n\n The stomach is a unique organ in the digestive system, designed to handle harsh conditions, including a highly acidic environment due to hydrochloric acid (HCl) and potent digestive enzymes like pepsin. Despite these potentially damaging substances, the stomach does not digest itself thanks to several protective mechanisms, the most significant of which is the secretion of mucus.<\/p>\n\n\n\n Mucus is a thick, viscous fluid produced by specialized cells lining the stomach. This mucus forms a protective barrier on the stomach walls, serving two primary functions. Firstly, it provides a physical coating that helps shield the epithelial cells from direct contact with the corrosive gastric acid and enzymes. This barrier is essential because, without it, the acidic environment could damage the stomach lining, leading to ulcers and other gastrointestinal issues.<\/p>\n\n\n\n Secondly, mucus has a slightly alkaline pH, which neutralizes some of the gastric acid at the surface of the stomach lining, reducing its corrosive potential. This is crucial in maintaining the integrity of the stomach wall. The stomach also undergoes regular cellular turnover, with epithelial cells being replaced frequently. This regeneration process further helps to maintain the stomach\u2019s integrity, as damaged cells are quickly replaced.<\/p>\n\n\n\n Additionally, the production of bicarbonate ions, which are secreted alongside mucus, plays a role in maintaining a balanced pH at the stomach lining, providing further protection against acidity.<\/p>\n\n\n\n In summary, while the stomach contains powerful acids and enzymes for digestion, its ability to produce large amounts of mucus, along with other protective mechanisms, ensures that it does not digest itself. This intricate balance allows the stomach to function effectively in the digestive process while safeguarding its own tissue.<\/p>\n","protected":false},"excerpt":{"rendered":" The stomach contains hydrochloric acid and digestive enzymes. Why doesn\u2019t the stomach digest itself?. A.The stomach wall is not composed B.The stomach wall is protected by large amounts of mucus. C.The digestive enzymes in the stomach are not strong enough. D.The rugae lining of the stomach is too tough to be attacked by digestive enzymes. 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