Sodium channels are maximum in which part
of neuron ?
a) Soma
b) Axon hillock
c) Dendrites
d) Axon
Correct Answer - B
Ans. is’b’i.e., Axon hillock
In a motor neuron, the axon hillock and the initial segment of axon
have the lowest threshold for excitation.
This is because they have a much higher intensity of voltage gated
sodium channel.