What Is the Membrane Conductance of a Cell with a Specific

question 40

Multiple Choice

What is the membrane conductance of a cell with a specific membrane resistance of 1,000  cm² and 50,000  cm²?

• A) The first cell has a specific membrane conductance of 1  10⁹ pS/cm², the second cell has a specific membrane conductance of 2  10⁹ pS/cm². Therefore, the first cell has a larger surface density of open channels.
• B) The first cell has a specific membrane conductance of 1  10⁹ pS/cm², the second cell has a specific membrane conductance of 2  10⁷ pS/cm². Therefore, the first cell has a smaller surface density of open channels.
• C) The first cell has a specific membrane conductance of 100  10⁷ pS/cm², the second cell has a specific membrane conductance of 2  10⁷ pS/cm². Therefore, the first cell has a larger surface density of open channels.
• D) The first cell has a specific membrane conductance of 1  10⁷ pS/cm², the second cell has a specific membrane conductance of 0.5  10⁷ pS/cm². Therefore, the first cell has a smaller surface density of open channels.
• E) The first cell has a specific membrane conductance of 1  10⁹ pS/cm², the second cell has a specific membrane conductance of 2  10⁷ pS/cm². These values do not depend on the surface density of open channels.

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