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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?
Methicillin-resistant Staphylococcus aureus or MRSA was discovered in 1961 in the United Kingdom. It if often referred to as a superbug. MRSA infections cause more deaths in the United States every year than AIDS.
Did you know?
The horizontal fraction bar was introduced by the Arabs.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
Did you know?
People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.