A threshold potential is A) the potential achieved when two opposing forces acting upon an ion (concentration and electrical gradients) achieve a state of equilibrium B) the peak potential achieved during an action potential C) the point at which there is an explosive increase in Na⁺ or Ca²⁺ permeability D) the potential at which K⁺ permeability increases E) always a positive potential

Question

Quizplus · Accepted Answer

A threshold potential is the point at which there is an explosive increase in Na+ or Ca2+ permeability, leading to depolarization and the initiation of an action potential.

A Threshold Potential Is