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In 1864, the first barbiturate (barbituric acid) was synthesized.

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Lower drug doses for elderly patients should be used first, with titrations of the dose as tolerated to prevent unwanted drug-related pharmacodynamic effects.

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Street names for barbiturates include reds, red devils, yellow jackets, blue heavens, Christmas trees, and rainbows. They are commonly referred to as downers.

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Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.

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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.

Follicle and oocyte development in humans. Follicle and oocyte development in humans.
Cross-section of skin and a hair follicle. Note the shaft of the hair, the root, and papilla Cross-section of skin and a hair follicle. Note the shaft of the hair, the root, and papilla
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Video: Cellular slime mold life cycle Animation

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