Here is a homework question, I’ve answered it to the best of my ability.

Here is a homework question, I’ve answered it to the best of my ability.

Describe the movement of Na+ molecules in the three phases (depolarisation, repolarisation and hyperpolarisation) of an action potential.

Depolarisation: Na+ channels open > Na+ flows into cell

Repolarisation: Na+ channels inactivating

Hyperpolarisation: Na+ channels reset

Describe the movement of K+ molecules in the three phases (depolarisation, repolarisation, hyperpolarisation) of an action potential.

Depolarisation: –

Repolarisation:  K+ channels open > K+ flows out of cell

Hyperpolarisation: some K+ channels remain open > some K+ continues to flow out of cell