Action Potential Diagram

Area 1 of the Action Potential Diagram is _______

-70 (Resting State)

Area 2 of the Action Potential Diagram is _______

-55 (Threshold of Excitation)

Area 3 of the Action Potential Diagram is _______

0

Area 4 of the Action Potential Diagram is _______

40 (Action Potential)

Area 5 of the Action Potential Diagram is _______

Membrane Potential (mV), Y-Axis

Area 6 of the Action Potential Diagram is _______

Time (ms), X-axis

Area 8 of the Action Potential Diagram is _______

Stimulus

Area 9 of the Action Potential Diagram is _______

Depolarization

During the Depolarization Phase, _______

- Voltage-gated sodium channels are opened

- Membrane potential becomes positive

- Sodium floods into the cell

Area 10 of the Action Potential Diagram is _______

Peak Action Potential

Area 11 of the Action Potential Diagram is _______

Repolarization

Area 12 of the Action Potential Diagram is _______

Threshold of Excitation

During the Repolarization Phase, _______

- (membrane gets between 0 and 40)

- Voltage gated potassium channels triggered

- Sodium channels close

- Potassium (positive charge) pushed out of the cell

- NA+/K+ pump restores the resting potential after refractory period & slowly brings K+ back into the cell

Area 13 of the Action Potential Diagram is _______

Resting State

The Blue area of the Action Potential Diagram Shows ______

Relative Refractory Period

The Yellow area of the Action Potential Diagram Shows ______

Absolute Refractory Period

During the Relative Refractory Period, _______

Another action potential can be induced, but the stimulus must be higher because the cell is hyperpolarized.

During the Absolute Refractory Period, _______

Another action potential cannot be induced