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More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.

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Colchicine is a highly poisonous alkaloid originally extracted from a type of saffron plant that is used mainly to treat gout.

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Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.

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Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.

The cellular response of skeletal muscle cells to epinephrine The cellular response of skeletal muscle cells to epinephrine
The effects of epinephrine in humans The effects of epinephrine in humans
Synthesis of the amine hormones dopamine, norepinephrine, and epinephrine. Synthesis of the amine hormones dopamine, norepinephrine, and epinephrine.
Cytoplasmic response to a signal: the stimulation of glycogen breakdown by epinephrine. Cytoplasmic response to a signal: the stimulation of glycogen breakdown by epinephrine.
Primary Action of Epinephrine in a Liver Cell Primary Action of Epinephrine in a Liver Cell
Biosynthesis of the catecholamines—dopamine, norepinephrine, and epinephrine Biosynthesis of the catecholamines—dopamine, norepinephrine, and epinephrine
Video: Cleavage and Implantation Animation

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