Why is it important that ions beings transported across a cell membrane be shielded from the interior.....?

Question

here is the REAL question, because it didnt show the WHOLE entire question.

Real question:

Why is it important that ions beings transported across a cell membrane be shielded from the interior of the lipid bilayer?

Answer 1

It's not that they are being shielded from the inside of the lipid bilayer. It's more like the ion can't move across the LB due to the hydrophobicity of the interior, thus needs to have it's own special channel to do that movement. Since there are so many things in your body wihich REQUIRE the movement of those ions, you have to have a well controlled way of moving them. Thus the ion channels that are found on cell and other membrane surfaces.

Charged molecules and ions in general have a hard time moving across a lipid bilayer whereas a hydrophobic molecule will readily dissolve into the LB itself.