Introduction. Beta-blockers, also known as beta-adrenoceptor blocking agents, are medications used to treat conditions such as angina, heart failure and high blood pressure. They decrease the activity of the heart by blocking the action of hormones like adrenaline.
1 The concept of âdemographic changeâ describes a populationâs age structure adjusting to. changes in living conditions. Consequently, changes in thcomposition of a societyâe s age. structure are the result of social shifts. (. 2  cf. . 3  theory of first and second demographic transition.
List of U.S. states by population growth rate. Map of population change in U.S. states from April 1, 2010 to July 1, 2013. This article includes a list of U.S. states sorted by the percentage change in estimated population for the 75-month period from April 1, 2010 to July 1, 2016, the most recent estimates available from the United States Census Bureau. 1 Summary by state, division and region.