What is difference between depolarization and repolarization?

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Solution

Depolarisation :
Depolarisation is positively charged sodium ions resting in neurons.
It is caused by the opening of voltage-gated sodium channels.
Repolarisation :
Repolarisation is the closing of sodium ion channels and the opening of the potassium ion channels.
It changes in membrane potential that returns to its negative value.

Depolarisation
Repolarisation
The movements of a cell's membrane potential to a more positive value. It changes in membrane potential that returns to its negative value.
It increases the membrane potential. It decreases the membrane potential and restores the resting membrane potential
It is caused by the opening of voltage-gated sodium channels. It is caused by the closing of sodium ion channels and the opening of potassium ion channel
Facilitates the firing of an action potential Prevents the firing of an action potential

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Depolarisation	Repolarisation
The movements of a cell's membrane potential to a more positive value.	It changes in membrane potential that returns to its negative value.
It increases the membrane potential.	It decreases the membrane potential and restores the resting membrane potential
It is caused by the opening of voltage-gated sodium channels.	It is caused by the closing of sodium ion channels and the opening of potassium ion channel
Facilitates the firing of an action potential	Prevents the firing of an action potential