"Select all that apply
Indicate which of the following statements are true about signal conduction along unmyelinated fibers. a. Unmyelinated fibers have voltage-gated channels along their entire length.
b. The signal conduction in unmyelinated fibers is saltatory,
c. The red band in the diagram represents the relative refractory period.
d. A zone of depolarization excites voltage-gated channels immediately distal to the action potential. "