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Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.

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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

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Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.

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Excessive alcohol use costs the country approximately $235 billion every year.

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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.

Although Tasmanian devils are nocturnal, they like to rest in the sun. Scarring from fighting is vis Although Tasmanian devils are nocturnal, they like to rest in the sun. Scarring from fighting is vis
Normal glomerulus. Acute glomerulonephritis. Normal glomerulus. Acute glomerulonephritis.
Hypertroph​ic scarring Hypertroph​ic scarring
Diagram of the Glomerulus Diagram of the Glomerulus
Fates of drugs entering the glomerulus: filtration, reabsorption, secretion, and excretion. Fates of drugs entering the glomerulus: filtration, reabsorption, secretion, and excretion.
(A) Normal glomerulus and (B) acute glomerulonephritis. (A) Normal glomerulus and (B) acute glomerulonephritis.
Video: Neural Reflex Arc Animation

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