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Cyanide works by making the human body unable to use oxygen.

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The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

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Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).

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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.

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Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

Striated Muscle Fiber Striated Muscle Fiber
da vinci muscle da vinci muscle
The muscle-spindle feedback circuit The muscle-spindle feedback circuit
Effects of septal defects: (A) normal shunt; no cyanosis; (B) increased pressure in right ventricle; ... Effects of septal defects: (A) normal shunt; no cyanosis; (B) increased pressure in right ventricle; ...
Multiple sclerosis is characterized by damage to the myelin sheath surrounding the axons of motor ... Multiple sclerosis is characterized by damage to the myelin sheath surrounding the axons of motor ...
Testing muscle strength - Temporalis muscles Testing muscle strength - Temporalis muscles
Video: Semidiscontinuous DNA replication

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