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?