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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).
The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.
Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.