Driven by a concentration gradient,lipids are absorbed through the process of:

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Lipids are nonpolar molecules that can easily pass through the plasma membrane by passive diffusion, which does not require the use of energy or carrier proteins. The concentration gradient allows the lipids to move from an area of higher concentration to an area of lower concentration until equilibrium is reached. Facilitated diffusion and active transport both require carrier proteins, and lipid molecules are too large to be taken up by endocytosis.

Driven by a Concentration Gradient,lipids Are Absorbed Through the Process