Action potentials are normally initiated at the axon hillock because

a. there is a particularly high density of voltage-gated sodium channels there.
b. threshold potential is lower there than at other sites along the plasma membrane.
c. activation of sodium channels at the axon hillock results in a particularly strong inward current and consequent depolarization.
d. all of these.
e. none of these.


D

Anatomy & Physiology

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