Neuron Cells Generate Electrical Signals by Concentration Gradients Across Membranes

question 120

Multiple Choice

Neuron cells generate electrical signals by concentration gradients across membranes.Assuming a potassium ion concentration of 0.00300 M inside the cell and a concentration of 0.135 M outside the cell, what is the electrical potential across the cell membrane? Body temperature is 310 K.The sign identifies the change in the electrical potential across the membrane and which way the ions flow.

• A)(+2 mV)
• B)(-136 mV)
• C)(+.0 mV)
• D)(-204 mV)
• E)(+204 mV)

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