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  • 13-03-2017
  • Biology
Answered

What types of molecules need more help to get through the cell membrane what helps them get through?

Verified Answer :

Anonymous Anonymous
  • 13-03-2017

Water diffusion is called osmosis. Oxygen is a small molecule and it's nonpolar, so it easily passes through a cell membrane. Carbon dioxide, the byproduct of cell respiration, is small enough to readily diffuse out of a cell. Small uncharged lipid molecules can pass through the lipid innards of the membrane.

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