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As ions are polar substances ..how can they undergo simple diffusion across the lipid bilayer membrane?????

As ions are polar substances ..how can they undergo simple diffusion across the lipid bilayer membrane?????

Grade:12th pass

1 Answers

Vikas TU
14149 Points
2 years ago
Dear studdent 
The plasma membrane is selectively permeable; hydrophobic molecules and small polar molecules can diffuse through the lipid layer, but ions and large polar molecules cannot. Integral membrane proteins enable ions and large polar molecules to pass through the membrane by passive or active transport.
The structure of the 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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