If ion channels selective only for x were open would the neu

If ion channels selective only for x+ were open, would the neuron\'s resting membrane potential be negative, positive or zero?

Solution

The opening of channels that let positive ions flow out of the cell (or negative ions flow in) can cause hyperpolarization.The opening of channels that let positive ions flow into the cell can cause depolarization.Hyperpolarization is when the membrane potential becomes more negative at a particular spot on the neuron’s membrane,while depolarization is when the membrane potential becomes less negative (more positive).
At this threshold, voltage-gated Na+ channels in the membrane open,allowing many sodium ions to rush into the cell. This influx of sodium ions makes the membrane potential increase very rapidly, going all the way up to about + 40mV.After a short time,the sodium channels self-inactivate (close and become unresponsive to voltage), stopping the influx of sodium.A set of voltage-gated potassium channels open, allowing potassium to rush out of the cell down its electrochemical gradient.These events rapidly decrease the membrane potential, bringing it back towards its normal resting state.The voltage-gated potassium channels stay open a little longer than needed to bring the membrane back to its resting potential.This results in which the membrane potential briefly dips lower (more negative) than its resting potential.