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Did you know?
Approximately 500,000 babies are born each year in the United States to teenage mothers.
Did you know?
The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.
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Medication errors are more common among seriously ill patients than with those with minor conditions.
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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.