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There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).
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The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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When taking monoamine oxidase inhibitors, people should avoid a variety of foods, which include alcoholic beverages, bean curd, broad (fava) bean pods, cheese, fish, ginseng, protein extracts, meat, sauerkraut, shrimp paste, soups, and yeast.
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In most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.
Amsterdam Albatross - Adult in flight, showing dark plumage typical of the species.
Diagram of a typical fossil-fueled power plant
Structure of a typical neuron.
Typical engine analyzer hookup that includes a scope display. (1) Coil wire on top of the ...
Typical Reverse Osmosis Filter Setup
Portrait of Typical 12-year-old Boy and Girl, 1981 and 2007-2009