Ecogenetics: The interaction of genetics with the environment. For example, persons with the genetic disease phenylketonuria (PKU) lack an enzyme that is needed to process the amino acid phenylalanine, and they require a special environment: a diet low in phenylalanine.
- Economy class syndrome
Economy class syndrome: The formation of blood clots in veins deep within the legs — deep vein thrombosis — occurring during (or just after) a long airplane flight, especially in economy class (tourist class) where there is the least space allotted per passenger and ones legs tend especially to be immobilized for lack of leg […]
ECST: EST stands for the exercise stress test, the most widely used cardiac (heart) screening test. In an EST the patient exercises on a treadmill according to a standardized protocol, with progressive increases in the speed and elevation of the treadmill (typically changing at three-minute intervals). During the EST, the patient’s electrocardiogram (EKG), heart rate, […]
Ecstasy: 1. A state of rapture and trancelike elation. 2. A street name for 3-4 methylenedioxymethamphetamine (MDMA), best known on the street as “Ecstacy.” An illicit drug, considered a recreational or party drug. It acts as both a stimulant and a hallucinogen. Ecstasy achieves its high by preventing the brain from reabsorbing the chemical serotonin, […]
Ecstatic: Pertaining to ecstasy, a state of rapture and trancelike elation.
Ectoderm: One of the three primary germ cell layers (the other two being the mesoderm and endoderm) that make up the very early embryo. The ectoderm is the outermost of the three layers. It differentiates to give rise to many important tissues and structures including the outer layer of the skin and its appendages (the […]