Small fat-soluble molecules, such as free fatty acids and fat-soluble vitamins, are absorbed through facilitated diffusion in the small intestine. Small Fat Soluble Molecules Essay
subject name : Nutrition
Small fat-soluble molecules such as free fatty acids and fat-soluble vitamins are absorbed through a process called “simple diffusion” in the small intestine, not “facilitated diffusion.” Simple diffusion is a passive process that occurs when molecules move from an area of higher concentration to an area of lower concentration, down their concentration gradient, without the need for a carrier protein or energy input.
During digestion, fat-soluble molecules are emulsified by bile salts and pancreatic enzymes, forming micelles that can pass through the aqueous environment of the small intestine and diffuse across the lipid bilayer of the enterocyte cells that line the small intestine. From there, the fat-soluble molecules are transported into the bloodstream and carried to the liver for further processing and distribution to the rest of the body.
In summary, small fat-soluble molecules such as free fatty acids and fat-soluble vitamins are absorbed through simple diffusion, not facilitated diffusion, in the small intestine. Small Fat Soluble Molecules Essay