Question

How does a phospholipid bilayer affect the movement of substances across membranes?

Answer 1

Thus, movement across the hydrophobic portion of a membrane is the rate-limiting step in the passive diffusion of molecules across cell membranes. ... The greater the hydrophobicity of a water-soluble molecule, the faster it diffuses across a phospholipid bilayer.

Answer 2

Answer:

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lipid bilayer allows small, uncharged substances such as oxygen and carbon dioxide, and hydrophobic molecules such as lipids, to pass through the cell membrane, down their concentration gradient, by simple diffusion.

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