Question

during an action potential, the relative charge across the membrane of an axon is reversed. which ion makes the largest contribution to this change in potential, and in what direction does the ion move?

Answer 1

In the depolarization step of action potential where the membrane resting potential is reversed by the rush of sodium ions into a neuron.

A membrane potential shift from -70mV to +30mV for a limited period of time is known as an action potential.

The moving action potential has three stages:

1) The depolarization step, where sodium ions rush into a neuron and reverse the membrane resting potential; and

2) repolarization, which is a mechanism that restores the resting voltage of the membrane and the ionic concentration in the cell, is caused by the closure of the voltage-gated sodium channels and the opening of the potassium channels.

3) Hyperpolarization, when excessive potassium ion efflux occurs as a result of some open potassium channels increasing potassium permeability and causing a drop in the membrane potential.

4) The action potential, which is a transient reversal of membrane potential that travels through the axon, comprises three phases that are described above.

To learn more about the action potential please click on the given link: brainly.com/question/4899353

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