An action potential moves along an axon due to the sequential opening of voltage-gated Na+ channels. The diagram below shows voltage-gated Na+ channels separated by a short distance in the plasma membrane of an axon. Initially (left panel), only channel (a) is open. Within a very short time (right panel), channel (b) also opens.
Which statement correctly describes what causes the second voltage-gated Na+ channel to open?

The second channel opens as a result of changes in the distribution of charges close to the first channel brought on by the movement of many ions (both inside and outside the cell).

A membrane's voltage varies rapidly in a series known as action potentials. The relative ratio of extracellular to intracellular ions and the permeability of each ion define the membrane voltage, or potential, at any given time.

Depolarization, a sudden rise in potential, occurs all-or-nothing in neurons and is brought on by the opening of sodium ion channels in the plasma membrane.

Repolarization, the ensuing restoration to the resting potential, is mediated by the opening of potassium ion channels. An ATP-driven pump (Na/K-ATPase) induces movement of sodium ions out of the cell and potassium ions into the cell to restore the proper balance of ions.

To know more about action potential:

https://brainly.com/question/4305583

#SPJ4