No impulse can be sent through a neuron:
A) during the relative refractory period.
B) when the charge of the neuron is -70.
C) during the absolute refractory period.
D) when the stimulus is too strong.

Question

Quizplus · Accepted Answer

During the absolute refractory period, the neuron is unable to send an impulse because its voltage-gated ion channels are inactivated and cannot be reopened by any stimuli. This period typically lasts about 1-2 milliseconds and is a necessary part of the neuron's ability to fire action potentials at regular intervals. During the relative refractory period, the neuron can send an impulse but requires a stronger-than-normal stimulus to reach the threshold potential. When the neuron's charge is -70 mV, it is at its resting potential and is not sending an impulse. If the stimulus is too strong, it could lead to an action potential being sent, but it does not prevent impulse transmission.

No Impulse Can Be Sent Through a Neuron