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Practice problem

What Are Lipids? — Structure & Function

By Reagan Devine
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Outside of the cell membrane is a sodium ion.

By Masur [Public domain], via Wikimedia Commons

Based on what you know about the polarity of the lipids that compose the cell membrane, how would you expect the Na+^+ ion to pass through into the cell?

Choose one answer

Type a concept, like “slope” or “photosynthesis”.

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