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🔬 Biology  ·  Neural Control and Coordination  ·  NEET

The resting potential of a neuron is approximately:

Answer: -70 mV.

  • A +70 mV
  • B -70 mV
  • C 0 mV
  • D 120 mV

Correct answer: B. -70 mV

Explanation: The resting membrane potential is about -70 mV (inside negative relative to outside) due to K+ leakage and Na+/K+ pump.

Labeled diagram of a neuron showing dendrites, cell body (soma) with nucleus, axon, myelin sheath, Nodes of Ranvier, and axon terminals

Structure of a neuron. Image: LadyofHats (Mariana Ruiz), Public Domain, via Wikimedia Commons.

Concept context

Brain, spinal cord, neurons, reflex arcs, and sense organs.

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