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
The Economic Performance Index (EPI) is a macro-indicator that examines the overall performance of a countryâs economy and reports any deviation from the desired level of economic performance. Similar to the construction of GDP, which measures the overall output of an economy, the EPI reflects the active in the economyâs three main sectors: households, firms, and government. The EPI comprises variables that