How Neurons Work
The basic cell of the nervous system
Neurons and glial cells
Neurons are specialized cells that send and receive signals. They usually have a cell body, dendrites that receive input, and an axon that sends output. Glial cells support neurons by feeding, protecting, insulating, and helping organize the nervous system.
Neuron parts
Electrical signaling
Neurons use electrical impulses to carry information over distance, then chemical signals at synapses to pass information to the next cell.
Which part of a neuron usually sends signals away from the cell body?
The axon carries signals away from the cell body.
Correct answer: Axon
What is the name of the gap between two neurons?
A synapse is the connection point where one neuron communicates with another.
Correct answer: synapse
How a signal moves
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Step 1: A neuron receives input on its dendrites.
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Step 2: The cell body integrates the input.
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Step 3: If the signal is strong enough, an electrical impulse travels down the axon.
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Step 4: Chemicals are released at the synapse to signal the next cell.
What is the main role of glial cells?
Glial cells support neurons in several important ways, including protection and insulation.
Correct answer: Support and protect neurons
Why synapses matter
Synapses are important because they let the nervous system control communication with precision. Many medicines and diseases affect synapses, which is why understanding them helps explain how the brain works and how some neurological symptoms develop.