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
informed decisions by seeing the big picture of the economy. The Economy Performance Index (EPI) is designed to solve these problems. Though structurally simple, the EPI is a powerful macro indicator that clearly measures the performance of the economyâs three primary segments: households, firms, and government.