Pyrethroid insecticides prevent the voltage-gated sodium channels of insects from inactivating. Neurons that were exposed to pyrethroids would ________.
A) become hyperpolarised during an action potential
B) not repolarise during an action potential
C) not be able to open potassium channels
D) not release neurotransmitter molecules

Question

Quizplus · Accepted Answer

By preventing inactivation of the voltage-gated sodium channels, pyrethroids prolong the depolarization phase of the action potential and prevent repolarization, which can lead to neuronal hyperexcitation and death. This means that neurons exposed to pyrethroids would not repolarize during an action potential.

Pyrethroid Insecticides Prevent the Voltage-Gated Sodium Channels of Insects from Inactivating