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.
At 2 a.m. on March 8, 2015, Americans will turn their clocks ahead one hour, marking the beginning of Daylight Saving Time (DST) . The federal law that established daylight time in the United States does not require any area to observe daylight saving time.t 2 a.m. on March 8, 2015, Americans will turn their clocks ahead one hour, marking the beginning of Daylight Saving Time (DST) . The federal law that established daylight time in the United States does not require any area to observe daylight saving time.