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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?
It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.
Did you know?
Asthma cases in Americans are about 75% higher today than they were in 1980.
Did you know?
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
Did you know?
Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.