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Author Question: Stimulants promote the activity of the brain chemicals _______________ and ________________, which ... (Read 29 times) |
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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Excessive alcohol use costs the country approximately $235 billion every year.
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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.