Action of cholera toxin. See below for description. A, B (cholera toxin subunits); GM1 (GM1 ganglioside receptor); G s a (G protein); AC (adenylate cyclase); G i (G protein); cAMP (cyclic AMP); CFTR (cystic fibrosis transmembrane conductance regulator).
eccentric contraction, a type of muscle contraction that occurs as the muscle fibers lengthen, such as when a weight is lowered through a range of motion. The contractile force generated by the muscle is weaker than an opposing force, which causes the muscle to stretch.
Astronomy and celestial mechanics. In astronomy, an anomaly of an elliptical orbit, generally measured with respect to an apsis, usually the periapsis. Eccentric anomaly, an intermediate value used to compute the position of a celestial object as a function of time.