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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?
There are 60,000 miles of blood vessels in every adult human.
Did you know?
The average office desk has 400 times more bacteria on it than a toilet.
Did you know?
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
Did you know?
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.