Which of the Following Is True About the Movement of Ions

question 53

Multiple Choice

Which of the following is true about the movement of ions across excitable living membranes?

• A) Ions always move actively across membranes through leakage channels.
• B) Ions always move from an area of higher concentration to an area of lower concentration
• C) Sodium gates in the membrane can open in response to electrical potential changes.
• D) Ions always move passively across membranes.

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