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