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Which of the following is true of early civilizations?
Serotonin
A neurotransmitter associated with mood regulation, happiness, and anxiety control.
Neurotransmitter
Chemical substances in the brain that transmit signals from one neuron to another across synapses.
Amnesia
A condition in which a person is unable to remember important information or experiences, typically due to trauma or medical conditions.
Serotonin
A chemical messenger that plays a crucial role in regulating mood, digestive functions, and sleep patterns.
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