The Depolarization of the Membrane Due to a Stimulus Is

The depolarization of the membrane due to a stimulus is a regenerative mechanism meaning that, once sodium gates begin to open, even more sodium gates will be activated leading to a larger inflow of sodium ions and more depolarization until it is terminated when sodium gates close. This is an example of

A) positive feedback.
B) inhibitory graded potentials.
C) electrotonic conduction.
D) negative feedback.
E) excitatory graded potentials.