How Do Ions Move Across the Cell Membrane

question 35

Multiple Choice

How do Ions move across the cell membrane?

• A) Ions are soluble in the polar ends of the phospholipids.
• B) Ions form cation-anion pairs that are soluble in the nonpolar interior of the bilayer.
• C) Proteins called ion channels allow the ions to cross the membrane.
• D) The ions squeeze between the phospholipids.

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