Question

Which is true about digestion and absorption of food?

• A. 60% starch is hydrolysed by salivary amylase
• B. Oxyntic cells secrete pepsinogen
• C. Chylomicrons are small lipoprotein particles passed in intestine into blood capillaries
• D. Fructose and amino acids are absorbed in intestine with the help of carrier ions of $N{a}^{+}$

Answer 1

The correct option is D Fructose and amino acids are absorbed in intestine with the help of carrier ions of $N{a}^{+}$

30% starch is hydrolyzed by salivary amylase, oxyntic cells secrete $HCl$ and intrinsic factor.

Fructose and some amino acids are absorbed by $N{a}^{+}$ using facilitated transport. 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+'.