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Did you know?
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.
Did you know?
Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.
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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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Illicit drug use costs the United States approximately $181 billion every year.
Did you know?
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.