Question

Which one of the following choices can transport monoglycerides and long-chain fatty acids through the intestine to the microvilli of cells?
A. Lipoproteins


B. Micelles


C. Chylomicrons


D. Both lipoproteins and chylomicrons

Answer 1

The answer is B. Micelles.                             

Answer 2

The right answer is B

The main stages of lipid digestion:

* Emulsification of fats;

* Hydrolysis of lipids;

* Formation of micelles; the free fatty acids and the monoglycerides produced by the digestion of lipids form with the bile salts water-soluble complexes called micelles and whose diameter is from 4 to 6 nm.

* Absorption by endocytosis of the micellar contents. The micelles allow the passage in hydrophilic medium of lipophilic substances towards the brush border by endocytosis. The polar fraction of the most soluble molecules is turned outwards and forms, with the bile salts, an "envelope" containing the most insoluble compounds