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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?
Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.
Did you know?
Blood is approximately twice as thick as water because of the cells and other components found in it.
Did you know?
On average, the stomach produces 2 L of hydrochloric acid per day.
Did you know?
Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.