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Drug-induced pharmacodynamic effects manifested in older adults include drug-induced renal toxicity, which can be a major factor when these adults are experiencing other kidney problems.

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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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Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.

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A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.

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Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

The path of light through the cornea, iris, lens, and striking the retina. The path of light through the cornea, iris, lens, and striking the retina.
The meninges. This figure illustrates the location and structure of each layer of the meninges and t The meninges. This figure illustrates the location and structure of each layer of the meninges and t
Subcutaneous layer Subcutaneous layer
Permafrost: Top layer temperatures increased by as much as 3˚C Permafrost: Top layer temperatures increased by as much as 3˚C
Inspecting the cornea Inspecting the cornea
Skin layer diagram Skin layer diagram
Video: Lipid catabolism ( ketogenesis and oxidation of glycerol) and Lipid anabolism (lipogenesis)

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