Saltatory Conduction Flashcards Preview

SCT3 Neurology Topic 3 > Saltatory Conduction > Flashcards

Flashcards in Saltatory Conduction Deck (7)
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1
Q

APs are conducted along neuron cell membranes by the movement of __________ ions.

A

SODIUM

2
Q

Many axons are sheathed in ___________, except for small nodes known as what?

A

MYELIN
+
NODES OF RANVIER (1 mm)

3
Q

What is it called when action potentials jump from node to node, using the myelination?

A

SALTATORY CONDUCTION

4
Q

What determines the speed of conduction along an axon?

A

DIAMETER
+
WHETHER IT’S MYELINATED

5
Q

What makes saltatory conduction increase nerve conduction velocity and use less energy?

A

SODIUM “PUMPS” ONLY NEED TO OPERATE AT NODES

not along whole axon

6
Q

Demyelinating diseases such as __________ __________ are often accompanied by debilitating fatigue.

A

MULTIPLE SCHLEROSIS

7
Q

If the impulse is propagated as a continuous wave of depolarization, the fibers are _______________.

A

UNMYELINATED