Page 8 - Unit 3: Brain Building
P. 8
Brain Signals: the brain’s postal system
This system is a bit like a letter in the post – information starts in
one place and travels to another.
When a neuron fires an electrical signal,
it travels down the trunk of the neuron
and releases special brain chemicals.
These brain chemicals and the ‘branches’
of the neuron help the signal to travel
across a gap (called the synapse) to the
next neuron.
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