NEET PG DENTAL EXAM

Detailed explanation-1: -THE STOMACH does not digest itself because it is lined with epithial cells, which produce mucus. This forms a barrier between the lining of the stomach and the contents. Enzymes, which make up part of the digestive juices are also secreted by the stomach wall, from glands with no mucus barrier.

Detailed explanation-2: -The stomach plays a critical role in the early stages of food digestion. Asides from squeezing and churning the food bolus, it also secretes a mixture of compounds, collectively known as “gastric juice.” Gastric juice comprises water, mucus, hydrochloric acid, pepsin, and intrinsic factor.

Detailed explanation-3: -Although the role of gastric mucus in providing physical protection against ingested particles, and preventing contact between digestive enzymes such as pepsin and the underlying mucosa is generally accepted, the barrier role function of gastric mucus with regard to luminal acid is still conjectural.

Detailed explanation-4: -The mucus therefore acts as a barrier to prevent pepsin from coming into contact with the proteins that make up the stomach. We have therefore determined that the correct answer is (C). Pepsin does not end up digesting the stomach because the epithelial cells of the stomach secrete a protective mucus layer.