First slide

Digestion of Food

Question

Select the correct match of the digested products in humans given in column I with their absorption site and mechanism in column II.

Moderate

A

Glycerol, fatty acids - Duodenum, move as chylomicrons
B

Cholesterol, maltose - Large intestine, active absorption
C

Glycine, glucose - Small intestine, active absorption
D

Fructose, $N a^{+}$ - Small intestine, passive absorption

Solution

Amino acids (e.g., glycine ), glucose - active absorption Small intestine
Absorption of some water, minerals and certain drugs takes place in the large intestine. Small amounts of monosaccharides like glucose, amino acids and some electrolytes like chloride ions are generally absorbed by simple diffusion. Some substances like glucose and amino acids are absorbed with the help of carrier proteins. This mechanism is called the facilitated transport. Transport of water depends upon the osmotic gradient. Various nutrients like amino acids, monosaccharides like glucose, electrolytes like Na+ are absorbed into the blood by active transport. Fats are absorbed as chylomicrons into lacteals of small intestine.

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