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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

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The longest a person has survived after a heart transplant is 24 years.

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There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

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Medication errors are three times higher among children and infants than with adults.

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ACTH levels are normally highest in the early morning (between 6 and 8 A.M.) and lowest in the evening (between 6 and 11 P.M.). Therefore, a doctor who suspects abnormal levels looks for low ACTH in the morning and high ACTH in the evening.

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Video: Electromagnetic Spectrum, Chlorophyll and Pigment & Light

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