How does neural impulse travel down an axon so quickly quizlet?

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How does a neural impulse travel down an axon so quickly?
How do impulses travel faster in a neuron?
What can increase the speed at which a neural impulse travels down the axon of a neuron?

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How does a neural impulse travel down an axon so quickly?

The axon is covered with a myelin sheath, a fatty layer that insulates the axon and allows the electrical signal to travel much more quickly. The node of Ranvier is any gap within the myelin sheath exposing the axon, and it allows even faster transmission of a signal.

How do impulses travel faster in a neuron?

In neurons with myelin sheaths, ions flow across the membrane only at the nodes between sections of myelin. As a result, the action potential jumps along the axon membrane from node to node, rather than spreading smoothly along the entire membrane. This increases the speed at which it travels.

What can increase the speed at which a neural impulse travels down the axon of a neuron?

591) - cells of neural crest origin that form a thin sheath that surrounds an unmyelinated axon, or, after having myelinated an axon, lies on the surface of the myelin sheath - the myelin sheath acts as an insulator that increases the rate of transmission of the nerve impulse along the axon.