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Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.
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The term pharmacology is derived from the Greek words pharmakon("claim, medicine, poison, or remedy") and logos ("study").
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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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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.
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The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.