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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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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.
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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
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Excessive alcohol use costs the country approximately $235 billion every year.