General Pharmacology. Beta-blockers are drugs that bind to beta-adrenoceptors and thereby block the binding of norepinephrine and epinephrine to these receptors. This inhibits normal sympathetic effects that act through these receptors. Therefore, beta-blockers are sympatholytic drugs.
Don't know much about the origins of daylight saving time? Maybe it's time to learn about the semi-annual time shift, which goes into effect on Sunday across most of the U.S. and in 69 other countries around the world. Benjamin Franklin is sometimes credited with the invention of daylight saving time.
The idea for changing the clocks is traced to Benjamin Franklin, who reckoned that people could conserve energy and revel in an extra hour of daylight if they moved their clocks forward in the spring, according to David Prerau, author of Seize the Daylight: The Curious and Contentious Story of Daylight Saving Time (Thunder's Mouth Press, 2005), as reported by Live Science.