Question

Resting membrane potential of neurons is maintained by

• A. hormones
• B. neurotransmitters
• C. ion channels
• D. none of these

Answer 1

The correct option is C ion channels

The resting membrane potential of a neuron is the electrical potential across the neural membrane of an unstimulated nerve cell. It is around -70 mV. Resting membrane potentials are maintained by different types of ion channels like the sodium-potassium pump and leak channels. Sodium potassium pump transports 3 Na+ outwards for 2 K+ into the cell. As a result, the outer surface of the axonal membrane possesses a positive charge while its inner surface becomes negatively charged.