Examlex
Which of the following substances is a central nervous system stimulant?
Endorphins
Natural chemicals in the body that act as painkillers and mood enhancers.
Serotonin
A neurotransmitter that has a key role in regulating mood, digestion, sleep, and other bodily functions.
Endogenous Opioids
Natural pain-relieving peptides produced by the body, such as endorphins, that modulate pain and stress responses.
Psychoneurological System
Relates to the study and interaction of the psychological processes and the nervous system.
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