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Author Question: The nurse is presenting a workshop on stress and adaptation to a group of teenagers at the local ... (Read 14 times) |
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
Vaccines prevent between 2.5 and 4 million deaths every year.
Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.
More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
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.