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Tetraethylammonium (TEA)is a potent neurotoxin that results in death from respiratory failure within 10 to 30 minutes.When a neuron is incubated with TEA,researchers observed that action potentials could be generated,but the membrane potential remained positive and never returned to the resting membrane potential.
-What channels could be opened that would counter the effects of TEA and allow the neuron to return to resting membrane potential?
A)chloride channels
B)calcium channels
C)sodium channels
D)There are no channels that can oppose the effects of TEA.

Question

Quizplus · Accepted Answer

Chloride channels, when opened, allow negatively charged chloride ions to enter the neuron, which would help counteract the positive membrane potential caused by TEA and help the neuron return to its resting membrane potential. Sodium and calcium channels would further depolarize the neuron, and the statement that no channels can oppose the effects of TEA is incorrect in this context.

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