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Question

Resting membrane potential of a neuron is approximately

A
70mV
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B
+70mV
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C
0.7V
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D
+0.7V
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Solution

The correct option is A 70mV
Resting membrane potential is the voltage difference across the cell membrane when the cell is at rest. Resting membrane potential of a neuron is approximately -70 mV. This indicates that at rest, there are more sodium ions outside the neuron and more potassium ions inside the neuron. At rest, neuron is more permeable to potassium ions than any other ions.
Thus, the correct answer is option A.

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