Nerve06/autonomic nervous system and synapses/saltatory conduction

Saltatory conduction is the mode characteristic for the myelinated fibers. The conduction speed is high.

On a membrane of the nerve fiber, an action potential in one place conducts by depolarizes the 'neighboring' membrane (as above-mentioned).

In non-myelinated fibers, the myelin, which has high electric resistance, does not exist.

So, action potential can take place at any place.

So, the 'neighbor' depolarized by an action potential is close.

So, the conducting distance for a certain amount of time is short.

So, the conducting speed is slow.

In myelinated fibers, the myelin, which has high electric resistance, does exist.

So, it is not that action potential can take place at any place, but rather, only at the gaps of the myelin (called node of Ranvier), where the electric resistance is low.

So, the 'neighbor' depolarized by an action potential is far.

So, the conducting distance for a certain amount of time is long.

So, The conducting speed is fast.

Challenge Quiz

1.

At the node of Ranvier, which is the gap in the myelin, the electric resistance is high low  正解! .

2.

Action potentials at the saltatory conduction, are generated only at at places other than  正解! the node of Ranvier.

3.

Saltatory conduction is characteristic in the myelilnated non-myelinated  正解! fibers.

4.

In saltatory conduction, the speed is fast slow  正解!.

5.

The conduction speed of the myelinated fibers are faster slower  正解! than that of the non-myelinated fibers.

6.

The conduction speed of the non-myelinated fibers are faster slower  正解! than that of the myelinated fibers.