Question

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

• A. About 60% of starch is hydrolysed 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 Na₊
• D. Chilomicrons are small lipoprotein particles that are transported from intestine into blood capillaries

Answer 1

Answer: (C)

After digestion, most of the monosaccharides are absorbed into the body via active transport using sodium ions. Fructose is absorbed via facilitated diffusion. Amino acids are absorbed via secondary active transport using sodium ions. Chylomicrons cannot enter blood capillaries and hence enter lacteals. Only 5% of starch is hydrolyzed in the mouth. Proenzyme pepsinogen is secreted by chief cells in the stomach So, the correct answer is 'Fructose and amino acids are absorbed through intestinal mucosa with the help of carrier ions like Na+'.