Which of the following is true of ion distribution across the axon membrane?
A) Chloride ions are more concentrated inside the axon membrane.
B) Potassium ions are more concentrated outside the cell membrane.
C) The action potential is the balance point between diffusion and electrostatic pressure.
D) Sodium ions are more concentrated outside the axon membrane.
E) Sodium ions are more concentrated inside the axon membrane.

Question

Quizplus · Accepted Answer

Sodium ions are more concentrated outside the axon membrane, which creates the concentration gradient that leads to their influx during depolarization and the generation of an action potential. Potassium ions, on the other hand, are more concentrated inside the cell, and chloride ions are more concentrated outside. The action potential is the result of the movement of ions through ion channels, driven by both their chemical gradients and the electrical potential difference across the membrane.

Which of the Following Is True of Ion Distribution Across