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

Threshold potential is the membrane potential at which there is a sudden increase in Na+ or Ca2+ permeability, leading to the depolarization of the membrane and initiation of an action potential.

A Threshold Potential Is