The body's electrical highway
Chapter 1
How nerves send lightning messages
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Chapter 2
Inside the brain's command center
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Chapter 3
The body's automatic survival systems
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Chapter 4
The brain's incredible shape-shifting power
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YOUR GOAL
Master of The body's electrical highway
Ch 1 · How nerves send lightning messages
Fun Fact
Nerve length: If you lined up all the nerves in an adult body end-to-end, they would stretch about 45 miles long.
Glossary
action potential (noun)
A momentary change in electrical potential associated with the passage of an impulse along a nerve cell. Alan Hodgkin and Andrew Huxley first recorded this electrical signal in 1939 using a giant squid axon.
A momentary change in electrical potential associated with the passage of an impulse along a nerve cell. Alan Hodgkin and Andrew Huxley first recorded this electrical signal in 1939 using a giant squid axon.
Quiz
What is the name of the protective, insulating layer that wraps around nerve fibers?
Quiz
What would be the total length of an adult human's nerves if stretched end-to-end?
