Examlex
The Köppen system was devised many hundreds of years ago.
Endorphins
Natural pain-relieving chemicals produced by the body that activate opioid receptors, helping to reduce pain and boost pleasure.
Morphine
Narcotic drug derived from opium, used to treat severe pain.
Heroin
Narcotic drug derived from opium that is extremely addictive.
Cognitive Neuroscience
Study of the physical changes in the brain and nervous system during thinking.
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