One complete heart beat, during which both atria and ventricles contract and relax, is termed _____ and is marked by a succession of changes in _____ and _____. within the heart the cardiac cycle, blood volume, pressure
Pan vs. Epi(demic) Good to know: An âepidemicâ is simply a proliferation of an infectious disease beyond that normally observed. A âpandemicâ is an epidemic that spreads across regions or continents. The number of dead is not part of the definition. Indeed, a pandemic may kill no one at all. October 27, 2009
(ep'i-tÅp), 1  The simplest form of an antigenic determinant on a complex antigenic molecule, which can combine with antibody or T cell receptor. [ 2 epi- + -tope] 3  A localized region on the surface of an antigen capable of eliciting an immune response and of combining with a specific antibody to counter that response.