Puffer fish poison blocks voltage- gated sodium channels like a cork. What effect would this neurotoxin have on the function of neurons?
A) Action potentials would lack a repolarization phase.
B) Neurons would depolarize more rapidly.
C) The axon would be unable to generate action potentials.
D) The absolute refractory period would be shorter than normal.
E) None, because the chemically gated sodium channels would still function.

Question

Quizplus · Accepted Answer

The neurotoxin blocks voltage-gated sodium channels, preventing the influx of sodium ions necessary for the initiation and propagation of action potentials, thus the axon cannot generate action potentials.

Puffer Fish Poison Blocks Voltage- Gated Sodium Channels Like a Cork