When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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By definition, when a medication is administered intravenously, its bioavailability is 100%.