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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.
Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.
On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.