What is the relationship between myelin and the propagation speed of action potentials?
A)The presence of myelin slows the propagation speed of action potentials.
B)The presence of myelin speeds up the graded depolarization but does not affect the propagation speed of action potentials.
C)The presence of myelin increases the propagation speed of action potentials.
D)The presence of myelin does not affect the speed of action potentials.
E)The presence of myelin blocks the propagation of action potentials.

Question

Quizplus · Accepted Answer

Myelin increases the propagation speed of action potentials by allowing them to skip over uninsulated parts of the axon, called nodes of Ranvier. This is called saltatory conduction and it significantly speeds up the overall transmission of signals.

What Is the Relationship Between Myelin and the Propagation Speed