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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.

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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.

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Less than one of every three adults with high LDL cholesterol has the condition under control. Only 48.1% with the condition are being treated for it.

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In 1885, the Lloyd Manufacturing Company of Albany, New York, promoted and sold "Cocaine Toothache Drops" at 15 cents per bottle! In 1914, the Harrison Narcotic Act brought the sale and distribution of this drug under federal control.

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Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.

Fractures are diagnosed based on an X-ray of the broken bone. Shown here: a comminuted fracture of ... Fractures are diagnosed based on an X-ray of the broken bone. Shown here: a comminuted fracture of ...
Graph to Function Cosine Graph to Function Cosine
State the transformations on the function f(x)= 4sin(x-pi)-2 and then graph two cycles below. State the transformations on the function f(x)= 4sin(x-pi)-2 and then graph two cycles below.
Population growth Population growth
economic question economic question
economic question economic question
Video: Primary Active Transport - electrochemical gradient and ion transport / water movement

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