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Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.

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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

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Disorders that may affect pharmacodynamics include genetic mutations, malnutrition, thyrotoxicosis, myasthenia gravis, Parkinson's disease, and certain forms of insulin-resistant diabetes mellitus.

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As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.

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During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.

Muscle fibers consist of single, elongated, multinucleated cells that arise from the fusion Muscle fibers consist of single, elongated, multinucleated cells that arise from the fusion
Thyrohyoid muscle Thyrohyoid muscle
Desmosomes and gap junctions, as shown in heart muscle: Desmosome Desmosomes and gap junctions, as shown in heart muscle: Desmosome
An AC voltage is produced by a magnetic sensor. Most sensors should produce at least 0.1 volt AC ... An AC voltage is produced by a magnetic sensor. Most sensors should produce at least 0.1 volt AC ...
Apply pincer pressure to TrPs in sternocleidomastoid (SCM) muscle. Turn head to side to expose SCM; ... Apply pincer pressure to TrPs in sternocleidomastoid (SCM) muscle. Turn head to side to expose SCM; ...
Structure of a myofiber (muscle cell) Structure of a myofiber (muscle cell)
Video: Muscle Twitch and Muscle Tension - Motor unit size and force

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