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All societies have social hierarchies.
Nicotine
A stimulating and highly addictive chemical found in tobacco that affects the central nervous system.
Acetylcholine
A neurotransmitter in the brain and body that plays significant roles in muscle activation, memory, and learning.
Half-life
The time required for the concentration of a substance in the body to decrease by half, often used in the context of drug metabolism.
Substance Use
The ingestion, inhalation, injection, or application of psychoactive substances, which may lead to addiction in some individuals.
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