Question

Which of the following statements is incorrect? The mucus secreted by the mucosal layer serves to lubricate the lumen allowing food to pass easily The mucus secreted by the mucosal layer serves to protect the cells of the gastrointestinal tract from digestive enzymes. Some mucosal cells of the digestive system secrete digestive enzymes. Some mucosal tissue of the digestive tract is highly folded which functions to increase surface area of absorption. The mucosal cells of the stomach are responsible for the absorption of amino acids from digested food.

Answer 1

Answer :

Incorrect option : 5th.

The mucosal cells in the stomach are not responsible for the absortion amino acids from digested food.

Generally amino acids are absorbed in intestinal region.

Correct options:

1st, 2nd, 3rd, 4th options are correct

Mucosa :It is the innermost layer lining the lumen of the alimentary canal. Mucosa of the stomach forms irregular folds called gastric rugae in between which there are many microscopic gastric glands. The mucosa of small intestine forms small finger like folds called villi. The columnar epithelial cells that lins villi produce numerous microscopic projection called microvillo giving brush border appearance. These modifications increase the surface area of absorption. Mucosal epithelium has goblet cells which secrete mucus, that helps in the projection of the wall from the action of enzymes,. It also helps in the lubrication of passage of food.