Question

The potential maintained across the neuron membrane during the resting stage is

• A. + 70 mV
• B. - 70 mV
• C. 0.5 V
• D. - 30 mV
• E. + 30 mV

Answer 1

Answer: (B)

- 70 mV

The negative charge that exists intracellularly when a neuron is not electrically active is the resting potential. It is typically -70 to -80 mV. Potassium ions ($K^{+}$) are seen inside the neuron. However Sodium ions ($N{a}^{+}$) are in higher concentration outside the neuron. These concentration differences maintain the resting potential.

Hence the correct option is B.