The Poison Tetraethylammonium (TEA) Interferes with Normal Neural Communication

question 40

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.

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