why-can-small-nonpolar-molecules-undergo-simple-diffusion-through-the-phospholip

Question

Why can small nonpolar molecules undergo simple diffusion through the phospholipid bilayer?

Accepted Answer

They can easily pass through the hydrophobic core of the bilayer.

Answer

They are polar and interact with the polar heads of phospholipids.

Answer

They are actively transported by membrane proteins.

Answer

They are too large to require transport proteins.