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Advanced medical technology has led to increases in health care costs.
Neurotransmitters
Chemical substances in the nervous system that transmit signals from one neuron to another across synapses.
Serotonin
A neurotransmitter involved in the regulation of mood, appetite, and sleep, among other functions.
Neuroticism
A personality trait characterized by moodiness, anxiety, and emotional instability.
Neurotransmitters
Chemicals found in the nervous system that transmit signals from one neuron to another across synapses.
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