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.
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Elderly adults are at greatest risk of stroke and myocardial infarction and have the most to gain from prophylaxis. Patients ages 60 to 80 years with blood pressures above 160/90 mm Hg should benefit from antihypertensive treatment.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.
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Warfarin was developed as a consequence of the study of a strange bleeding disorder that suddenly occurred in cattle on the northern prairies of the United States in the early 1900s.
Effects of introduced parasites on American chestnut trees.
A male American redstart, Setophaga ruticilla.
American alligator (Alligator mississippiensis)
Assessing for Phalen's Sign
Spanish-American War: Caribbean Theater, 1898
From 1965 to 1968, American troops in Vietnam conducted “search and destroy” missions to shatter ...