How are action potentials different in a myelinated axon and an unmyelinated axon?
A)Action potentials are slower in myelinated axons because the myelin sheath interferes with the transfer of ions across the membrane.
B)Action potentials "jump" from node to node in myelinated axons rather than progressing down the entire length of the axon.
C)Action potentials have greater electrical charges in myelinated axons.
D)Action potentials in myelinated axons operate according to the "all-or-none law" but action potentials in unmyelinated axons do not.

Question

Quizplus · Accepted Answer

In myelinated axons, the action potential "jumps" from node to node, a process called saltatory conduction, which speeds up the transmission of the signal. In unmyelinated axons, the action potential moves in a wave-like fashion down the entire length of the axon, which is slower.

How Are Action Potentials Different in a Myelinated Axon and an Unmyelinated