Examlex
The minimum amount of uranium-235 necessary to sustain a chain reaction is called the ________.
Depression Levels
A measure of the severity or intensity of depressive symptoms experienced by an individual.
Dopamine
A neurotransmitter involved in many functions, including motivation, reward, and motor control.
Serotonin
A neurotransmitter that contributes to feelings of well-being and happiness, playing important roles in mood regulation, digestion, and sleep.
Norepinephrine
Norepinephrine is a neurotransmitter involved in the body's response to stress and the regulation of mood, attention, and arousal.
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