Myelinated Vs Unmyelinated Fibres

Question 1

The difference in speed between myelinated and unmyelinated is because…

Answer 1

The action potential is able to jump over the myelin sheath

Question 2

___________ cells wrap around the nerve fibres when they are myelinated. This results in….

Answer 2

Schwann cells, results an impulses skipping from node to node

Question 3

What are the impulse speeds in Myelinated axons and dendrites vs unmyelinated fibers??

Answer 3

In myelinated axons and dendrites, The impulse can travel up to 200 m/s. In unmyelinated fibers, the impulse can be as slow as 0.5 m/s

Question 4

For an unmyelinated neuron, depolarization only occurs at the ___________________

Answer 4

Nodes of Ranvier