Electricity in the human body
Chapter 1
The spark of life
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Chapter 2
The body's wiring system
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Chapter 3
The ultimate electric pump
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Chapter 4
Electric senses and future tech
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YOUR GOAL
Master of Electricity in the human body
Ch 2 · The body's wiring system
Fun Fact
Nerve speed: Electrical signals in your myelinated motor nerves can travel at speeds of up to 268 miles per hour.
Glossary
nervous system (noun)
The network of nerve cells and fibers that transmits nerve impulses between parts of the body. In 1780, Luigi Galvani demonstrated how electrical currents travel through this biological network to contract muscles.
The network of nerve cells and fibers that transmits nerve impulses between parts of the body. In 1780, Luigi Galvani demonstrated how electrical currents travel through this biological network to contract muscles.
Quiz
What is the long, cable-like part of a neuron that carries electrical signals away from the cell body?
Quiz
What are the tiny gaps in the myelin sheath that allow electrical signals to jump and travel faster?
Quiz
What fatty substance insulates nerve fibers to prevent electrical signals from leaking?
Quiz
How do electrical signals cross the tiny gap, or synapse, between two separate nerve cells?
Quiz
Which structures in the cell membrane open and close to selectively let electrical ions pass through?
Quiz
Approximately how fast can electrical signals travel along the body's fastest insulated nerve fibers?
Quiz
What is the name of the rapid electrical reversal that travels down a nerve cell membrane?