Saltatory conduction is rapid because
A) cable properties carry the signal under the myelin sheath.
B) myelinated cells have more leakage through the membrane.
C) myelinated axons are larger in diameter.
D) myelinated cells have more ion channels per unit area than do non-myelinated cells.
E) myelinated fibers have a lower threshold of activation.

Question

Quizplus · Accepted Answer

Saltatory conduction is rapid because the myelin sheath insulates the axon, allowing the electrical signal to "jump" from one node of Ranvier to the next, rather than having to travel the entire length of the axon membrane. This "jumping" mechanism, facilitated by the cable properties under the myelin sheath, speeds up signal transmission significantly.

Saltatory Conduction Is Rapid Because