Question

How hyperpolarsation in neuron again reaches at polarisation?

Answer 1

The neuron continues to re-polarize until the cell reaches ~ –75 mV, which is the equilibrium potential of potassium ions. ... After hyperpolarization the potassium channels close and the natural permeability of the neuron to sodium and potassium allows the neuron to return to its resting potential of –70 mV.

Answer 2

Answer:

$\huge\underline{\underline{\mathfrak\red{Answer}}}$

If all the sodium channels are open, however, then the neuron becomes ten times more permeable to sodium than potassium, quickly depolarizing the cell to a peak of +40 mV. ... The neuron continues to re-polarize until the cell reaches ~ –75 mV, which is the equilibrium potential of potassium ions.