The Poison Tetraethylammonium (TEA) Interferes with Normal Neural Communication

Multiple Choice

The poison tetraethylammonium (TEA) interferes with normal neural communication. The toxin binds to and blocks voltage-gated potassium channels in the neuron cell membrane. Which of the following best describes the effects of TEA on the action potential?

A) The depolarization phase of the action potential fails to occur.
B) The repolarization phase of the action potential is blocked.
C) The refractory period of the action potential is shortened.
D) The action potential fails to be regenerated at the nodes of Ranvier.