Saltatory Conduction

Question 1

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

Answer 1

SODIUM

Question 2

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

Answer 2

MYELIN
+
NODES OF RANVIER (1 mm)

Question 3

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

Answer 3

SALTATORY CONDUCTION

Question 4

What determines the speed of conduction along an axon?

Answer 4

DIAMETER
+
WHETHER IT’S MYELINATED

Question 5

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

Answer 5

SODIUM “PUMPS” ONLY NEED TO OPERATE AT NODES

not along whole axon

Question 6

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

Answer 6

MULTIPLE SCHLEROSIS

Question 7

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

Answer 7

UNMYELINATED