Hi,here is a text I saw on the Internet

Question

"The membrane is highly permeable to non-polar (fat-soluble) molecules. The permeability of the membrane to polar (water soluble) molecules is very low. The permeability to charged molecular species (ions) is very low.

Surely i know cell membrane is lipid bilayer so that lipid soluble molecules can pass through easily BUT can anyone tell me the reason why water cannot across the membrane? (in the chemical point of view)

And,what is the reason that ion (charged) molecules are difficult to move through cell membrane?

Thank you very much for your detailed explanation

Answer 1

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