Neuron nerve impulse synapse

NCERT Biology Class 11, Chapter 18

The amplitude of the action potential in a neuron is closest to? NEET Biology MCQ

Last updated: July 30, 2026

Reviewed by MedQGo Editorial Team | Last updated: July 30, 2026

The amplitude of the action potential in a neuron is closest to

Apotassium equilibrium potential
Bsodium equilibrium potential
Cdifference between potassium equilibrium potential and resting potential
Ddifference between sodium equilibrium potential and resting potential

Correct answer: D. difference between sodium equilibrium potential and resting potential

The amplitude of the action potential in a neuron is closest to the difference between the sodium equilibrium potential and the resting potential. This is because during an action potential, sodium ions rapidly enter the cell, causing a depolarization that overshoots the sodium equilibrium potential.

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