Action Potential Review Questions
What causes the sodium channel to open? What causes it to close?
What causes the potassium channel to open? What causes it to close?
What is the relative timing of the opening of the three gates?
Why does the membrane potential become negative following the initial depolarizing spike?
What is the state of the 3 gates at threshold?
What is the relationship between the currents through the resting channels and the action potential channels at rest? At threshold?
What is the net current through the overall membrane at rest? At threshold?
What is the role of the sodium/potassium transporter durung the action potential? Which way do ions flow through the transporter?