Zebra


‘When you hear hoof beats, think of horses, not zebras.’ For example, when someone develops a mild transient cough, a virus infection is the most logical and likely cause, and tuberculosis is a zebra.

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  • ZAP-70

    Zeta-chain-associated protein kinase 70. A member of the protein tyrosine kinase family, ZAP-70 is normally expressed in T cells and natural killer cells and has a critical role in the initiation of T-cell signaling. ZAP-70 is expressed in T cells and tumors of T-cell lineage. A high level of ZAP-70 expression appears restricted to T-cell […]

  • Z chromosome

    A sex chromosome in certain animals, such as chickens, turkeys, and moths. In humans, males are XY and females XX, but in animals with a Z chromosome, males are ZZ and females are WZ.

  • Jennerization

    The production of immunity to a disease by inoculation of an attenuated form of the virus causing the disease. Named after the English physician Edward Jenner (1749-1823). Jenner exploited the folk knowledge that people who caught cowpox from their cows could not catch smallpox to develop a method of vaccination against smallpox using an attenuated […]

  • Pressor substance

    A substance that elevates the arterial blood pressure. For example, prostacyclin (prostaglandin PGI2) is a potent pressor substance. In medicine, pressor refers to raising the blood pressure. The word comes from the French verb “presser” meaning “to exert pressure” or “to squeeze.”


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