Which one of the following statements most accurately describes a neuron's threshold of excitation?
A) A neuron responds when it is stimulated by some of its neighboring neurons, but not when it is stimulated by other neighbors.
B) A neuron fires only when its electrical charge reaches a particular level.
C) A neuron is receptive to stimulation from other neurons only at points where there are gaps in its myelin sheath.
D) A neuron will fire at a maximum rate of no more than once every three seconds.

Question

Quizplus · Accepted Answer

The threshold of excitation is the minimum level of stimulation required to trigger a neural impulse or action potential. Once the neuron's electrical charge reaches a particular level, it will fire or send an action potential down its axon. Therefore, statement B is the most accurate description of a neuron's threshold of excitation. The other options either provide irrelevant information or are incorrect.

Which One of the Following Statements Most Accurately Describes a Neuron's