Question

Which change in the extracellular fluid produced the greatest change in the resting membrane potential inside the cell body? Explain the physiology behind your results.

Answer 1

Resting membrane potential ;

It is a result of different concentrations of Na+ and K+ ions in the intracellular and extracellular fluid.

Nerve impulses causes depolaristion by moving Na+ ions into intracellular fluid and that leads to depolaristion.

When the action potential is peak it causes K+ channels to open and causes hyperpolarisartion.

Here the Sodium channels begin to close and voltage gated potassium channels opened and hyperpolarisartion occurs.

As the hyperpolarisartion phase is done potassium channels closes.And the permeability of neuron to Sodium and potassium allows neuron to return to its resting membrane potential -70 mV.