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Quinine was used by Europeans to provide partial immunity from
Histamines
Compounds involved in local immune responses as well as regulating physiological function in the gut and acting as neurotransmitters.
Receptor Sites
Specific regions on the surface of a cell or within a cell to which specific molecules, such as hormones or neurotransmitters, can bind.
Morphine
A potent opiate analgesic drug derived from opium used to relieve severe pain.
Endorphins
Naturally occurring chemicals in the brain that reduce pain and boost pleasure, resulting in feelings of well-being.
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