Question

what causes the potential to increase from hyperpolarized to -70mV in refractory phase of nerve impulse transmission?​

Answer 1

Explanation:

This is the point at which the neuron is hyperpolarized, between –70 mV and –75 mV. 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.