Water can move across the (Semipermeable non polar lipid) membrane by simple diffusion (osmosis).

But polar molecules cannot pass through the non polar lipid bilayer, they require carrier proteins to facilitate their movement.

But water as well, is a polar molecule. How and why does it simply pass through the non polar lipid bilayer by simple diffusion and not by facilitated diffusion (i.e., through carrier proteins)?

  • 1
    $\begingroup$ @user1136 If you have an answer it should be posted as an answer rather than as a comment. $\endgroup$
    – Bryan Krause
    Apr 30 '19 at 14:00

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.