Which Is TRUE About the Initial Segment of an Axon

Multiple Choice

Which is TRUE about the initial segment of an axon?

A) Its membrane potential at threshold is more positive than that of the cell body and dendrites.
B) Its membrane potential at threshold is more negative than that of the cell body and dendrites.
C) Synapses far from the initial segment are more effective in influencing whether an action potential will be generated in the axon than are synapses close to the initial segment.
D) It is the region where neurotransmitter vesicles are docked and ready to be released by exocytosis.
E) It can only conduct graded potentials because it lacks voltage-gated Na⁺ channels.