Question

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

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

Answer 1

The correct option is C Chylomicrons are small lipoprotein particles that are transported from intestine into blood capillaries

Oxyntic cells produce HCl and Castle's intrinsic factor. Pepsinogen is produced by chief cells and mucous neck cells. Chylomicrons are lipoprotein particles synthesized by intestinal epithelial cells and consisting mainly of triglycerides. Chylomicrons are the form, in which dietary fat is transported in the circulatory system. Amino acids are absorbed through sodium active transport. But fructose is absorbed by facilitated diffusion. Salivary amylase is present in the saliva and it is added to the food in the mouth. But the hydrolysis action of the enzyme on starch is maximum in the stomach and not in the mouth.