Question

Which one of the following statements is true regarding digestion and absorption of food in humans?

• A. About 60% of starch is hydrolyzed by salivary amylase in our mouth
• B. Oxyntic cells in our stomach secrete the proenzyme pepsinogen
• C. Fructose and amino acids are absorbed through intestinal mucosa with the help of carrier ions like $N{a}^{+}$
• D. Chylomicrons are small lipoprotein particles that are transported from the intestine into blood capillaries.

Answer 1

The correct option is C Fructose and amino acids are absorbed through intestinal mucosa with the help of carrier ions like $N{a}^{+}$

Only about 5 % of the starch is hydrolysed by the salivary amylase in our mouth and rest of the starch is acted upon by amylase in the small intestine.
Parietal cells or oxyntic cells are the epithelial cells that secrete hydrochloric acid (HCl) and intrinsic factor. These cells are located in the gastric glands found in the lining of the fundus and in the body of the stomach.
Transport of lipids into the circulation is also different from what occurs with sugars and amino acids. Instead of being absorbed directly into the capillary blood, chylomicrons are transported first into the lymphatic vessel that penetrates into each villus.
The statement "Fructose and amino acids are absorbed through intestinal mucosa with the help of carrier ions like $N{a}^{+}$" is marked correct according to the official NEET answer key. This statement is only partially correct because although amino acids are absorbed through intestinal mucosa with the help of carrier ions like $N{a}^{+}$, fructose uses Glut - 5 a fructose unitransporter.