Examlex
Race is a social construction only loosely based on a few biological differences.
Aerobic Exercise
Physical activity that improves oxygen consumption by the body through sustained, rhythmic movement of large muscles groups.
Mood-boosting Neurotransmitters
Chemical messengers in the brain, such as serotonin, dopamine, and norepinephrine, that affect feelings of happiness and well-being.
Serotonin
A neurotransmitter that plays a key role in regulating mood, sleep, appetite, and digestion, among other functions.
Acetylcholine
A neurotransmitter involved in many functions including muscle movement and memory.
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