During a nerve impulse
A) the interior of the neuron becomes more negative.
B) sodium ions are pumped out of the neuron.
C) sodium ions are allowed into the neuron.
D) the entire neuron becomes positively charged.

Question

Quizplus · Accepted Answer

During a nerve impulse, sodium ions are allowed into the neuron, causing depolarization of the membrane potential. This allows for the propagation of the nerve impulse along the axon. Option A is incorrect because the interior of the neuron becomes less negative due to the influx of positively charged ions. Option B is incorrect because sodium ions are actually entering the neuron during a nerve impulse, not being pumped out. Option D is incorrect because although the membrane potential becomes positive during depolarization, the entire neuron does not become positively charged.

During a Nerve Impulse