Action Potential

Front

What is the process by which the sodium-potassium pump restores the resting potential?

Back

Active transport

Front

What does the sodium-potassium pump exchange during hyperpolarization?

Back

Exchanges (K+) & (Na+) to return a neuron to a resting state.

Front

In resting potential, which ion is more abundant on the outside of the cell membrane?

Back

Na+

Front

What happens when a membrane potential reaches +30mV?

Back

Potassium channels open, repolarization occurs, and sodium channels close.

Front

What is the function of the sodium-potassium pump?

Back

Moves sodium ions out of the cell and potassium ions into the cell.

Front

Define resting potential in neurons.

Back

The state where the inside of the neuron is negatively charged compared to the outside, typically around -70mV.

Front

What is depolarization?

Back

The process where the membrane potential becomes less negative (more positive) due to the influx of Na+ ions.

Front

What role do potassium ions (K+) play during repolarization?

Back

K+ ions exit the neuron, helping to restore the negative membrane potential.

Front

What is the significance of the threshold potential?

Back

The critical level to which a membrane potential must be depolarized to initiate an action potential.

Front

What occurs during the action potential phase?

Back

Rapid depolarization followed by repolarization, leading to a brief reversal of membrane potential.