Which of the Following Is True About the Movement of Ions

question 6

Multiple Choice

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

• A)Sodium gates in the membrane can open in response to electrical potential changes.
• B)The bulk of the solutions inside a cell are negatively charged.
• C)Ions always move actively across membranes through leakage channels.
• D)Some ions are prevented from moving down their concentration gradients by ATP- driven pumps.

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