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Standards or rules about what is acceptable behavior are referred to by social scientists as
Endorphins
Naturally occurring peptides produced in the brain that act as neurotransmitters to reduce the perception of pain and promote feelings of pleasure.
Morphine
An opiate analgesic derived from the opium poppy used for pain relief.
Sympathetic Systems
A part of the autonomic nervous system responsible for the body's 'fight or flight' response to stressful situations.
Parasympathetic Systems
A branch of the autonomic nervous system responsible for conserving energy and reducing the heart rate.
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