Action Potential Diagram Labeled 02

A labeled action potential graph plots a neuron's membrane potential (in millivolts) against time and names each stage of the spike. The labels mark resting potential, threshold, depolarization, the peak, repolarization, and hyperpolarization, so readers can follow the full sequence of voltage changes during a single action potential.

The phases are resting potential near -70 mV, depolarization once the membrane crosses threshold, a peak around +30 mV, repolarization back toward rest, hyperpolarization where the membrane briefly dips below resting potential, and the return to resting potential. A labeled graph names each phase along the voltage trace.

Threshold is the membrane potential, typically around -55 mV, that a stimulus must reach to trigger an action potential. Below threshold the cell returns to rest; at or above it, voltage-gated sodium channels open and the membrane depolarizes rapidly toward the +30 mV peak in an all-or-none response.

During depolarization, voltage-gated sodium channels open and sodium ions rush into the cell, driving the membrane potential up to roughly +30 mV. The peak is reached as those channels inactivate and potassium channels open, after which repolarization carries the voltage back down toward resting potential.

Depolarization is the rising phase where the membrane potential becomes more positive as sodium enters the cell, while repolarization is the falling phase where potassium leaves and the potential returns toward rest. A labeled action potential graph marks both phases on the same voltage-versus-time curve.

Yes. Generate the labeled action potential graph in SciFig, then export it as a transparent PNG for slides and posters, or vectorize it into editable SVG to relabel the phases, adjust the axis values, or restyle the curve before publishing it in your figure.