Know Your Nerve Fibers

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Which type of nerve fiber is covered with a fatty insulating layer called myelin?

Unmyelinated nerve fiber

Axon

Myelinated nerve fiber (correct)

Neuron

What are the small un-insulated gaps called in an unmyelinated nerve fiber?

Myelin

Neurons

Nodes of Ranvier (correct)

Axons

What are the two factors that affect the speed of propagation of the action potential?

Axons and neurons

Membranes and core

Resistance and capacitance (correct)

Myelin and nodes of Ranvier

What happens to the propagation velocity if there is a decrease in resistance within the core of the membrane?

It increases Signup and view all the answers

How does the charge stored in a myelinated section of a nerve fiber compare to that of an unmyelinated fiber of the same diameter?

The charge stored is lower in myelinated fibers Signup and view all the answers

Which type of conduction occurs when the action potential jumps from one node to the next?

Saltatory conduction Signup and view all the answers

What is the propagation velocity of unmyelinated axons?

20 to 50 m/sec Signup and view all the answers

What is the time constant of a membrane determined by?

Resistance and capacitance Signup and view all the answers

What is the velocity of conduction inversely related to?

Time constant of the membrane Signup and view all the answers

What is the record of the potentials from muscles during movement called?

Electromyogram (EMG) Signup and view all the answers

Know Your Nerve Fibers

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Questions and Answers

Which type of nerve fiber is covered with a fatty insulating layer called myelin?

What are the small un-insulated gaps called in an unmyelinated nerve fiber?

What are the two factors that affect the speed of propagation of the action potential?

What happens to the propagation velocity if there is a decrease in resistance within the core of the membrane?

How does the charge stored in a myelinated section of a nerve fiber compare to that of an unmyelinated fiber of the same diameter?

Which type of conduction occurs when the action potential jumps from one node to the next?

What is the propagation velocity of unmyelinated axons?

What is the time constant of a membrane determined by?

What is the velocity of conduction inversely related to?

What is the record of the potentials from muscles during movement called?

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