Examlex
Classical probability was the first type of probability studied formally by mathematicians
of the 17th and 18th centuries.
Neurotransmitters
Chemical substances in the brain that transmit signals between neurons, influencing various functions such as mood, sleep, and appetite.
Serotonin
A neurotransmitter involved in the regulation of mood, appetite, sleep, memory, and learning.
Norepinephrine
A neurotransmitter and hormone involved in the body's response to stress, also playing a key role in alertness and the fight-or-flight response.
Id
In psychoanalytic theory, the part of the personality that contains our primitive impulses such as sex, anger, and hunger, and operates on the pleasure principle.
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