Certain parts of the brain govern specific functions. For example, the cerebellum is involved with coordination; the hippocampus with memory. Nerve cells (neurons) are the basic unit of communication in the brain. Information is relayed from one area of the brain to other areas through complex circuits of interconnected neurons. Information via electrical impulses transmitted from one neuron to many others is done through a process called "neurotransmission."
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NIDA (2016). Understanding Drug Abuse and Addiction: What Science Says. Retrieved , from https://www.drugabuse.gov/understanding-drug-abuse-addiction-what-science-says
Explores the consequences of drug abuse on the brain and body and introduces the topics of prevention, and treatment.