Question

An action potential in one segment of axon causes adjacent sections of axon membrane to reach threshold through what mechanism?

Answer 1

Answer:

The generation of local currents.

Explanation:

An action potential at the axon hillock generates local currents that depolarize nearby sections of axon to threshold. This change in membrane potential causes voltage-gated Na+ channels to open in the adjacent axon segment. This generates/regenerates the action potential in the adjacent segment, causing the action potential to propagate away from the axon hillock.