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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).
Anti-aging claims should not ever be believed. There is no supplement, medication, or any other substance that has been proven to slow or stop the aging process.
Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.