An Electrical Charge or Membrane Potential Exists Across Nerve Cell

question 25

Multiple Choice

An electrical charge or membrane potential exists across nerve cell membranes because:

• A)the membrane is permeable to sodium ions.
• B)the cell membrane allows more positively charged ions to leak out than to leak in.
• C)the membrane is impermeable to all ions.
• D)water can flow freely across the membrane.

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