‘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.
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.
- Wordprocessor's cramp
A form of focal dystonia caused by wordprocessing that affects the muscles of the hand and, sometimes, the forearm. The term “dystonia” refers to a state of abnormal (too much or too little) muscle tone. There are many forms of dystonia. Dystonia disorders cause involuntary movements and prolonged muscle contraction, resulting in twisting body motions, […]
- Gland, sweat
A small tubular gland that is situated in the subcutaneous tissue within and under the skin. Sweat glands discharge sweat through tiny openings in the surface of the skin. The sweat itself is a transparent, colorless, acidic fluid that contains some fatty acids and mineral matter. Also known as sudoriferous gland.