Question

Choose the answer that lists the steps involved in the depolarization of a neuron during an action potential in the correct order.

1. Action potential stimulus.
2. Active transport of sodium and potassium ions.
3. Inactivation gates close.
4. Movement of potassium ions out of the cell.
5. Movement of sodium ions into the cell.
6. Opening of potassium channels.
7. Opening of sodium activation gates.

Answer 1

Before stimuli polarization is taking place, which can be called ( resting point)
then=
1) action potential stimulus
2) inactivation of the K/Na pump
3) opening of Na ions channels
4) movement of Na ions into the axon (cell). This part is depolarization
5) Na+ channels close
6) K+ channels open
7) k ions move outside of the axon (cell)
8) the k/Na pump opens; active transport of sodium and potassium ions
(k into the cell) and ( Na out of the cell)
This is called Repolarization.