The action potential is a sudden positive shift in the cardiomyocyte's cellular membrane potential, termed depolarization. Depolarization not only initiates contraction within the affected cardiomyocyte (Described in Cardiac Excitation-Contraction Coupling), but also initiates depolarization of adjacent cardiomyocytes.
Polar Coordinates The coordinate system which depicts the points from the pole to the certain distance at a particular angle is known as âpolar coordinatesâ. The positive horizontal axis in which that particular angle rotates is named as âpolar axisâ.
n (Geology) the movement of the earth's magnetic poles with respect to the geographic poles. English Collins Dictionary-English Definition & Thesaurus &nbsp. See also: polar axis, polar bear, polar body, polar circle. polar vortex. polar vortex. n. a large pocket of very cold air, typically the coldest air in the Northern Hemisphere, which sits over the polar region. tidal energy. tidal energy. n.