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.
Metastatic melanoma ( if i’m not wrong ) cancer that begins in the skin cells, which spreads to other parts of the body ( in this case liver and brain)
