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

Question

Quizplus · Accepted Answer

Pyrethroid insecticides prevent the inactivation of voltage-gated sodium channels, which means that sodium ions continue to enter the neuron during an action potential. This prevents the neuron from repolarizing back to its resting state, as repolarization requires the cessation of sodium influx and the opening of potassium channels to allow potassium ions to exit the neuron.

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