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.
To be on time for your Sunday activities, remember to turn your clocks forward one hour. The beginning of Daylight Saving Time is a great reminder to change the batteries in your smoke detectors, too. Most of the United States, including New Orleans, will lose an hour at 2 a.m. Sunday by moving forward into Daylight Saving Time. Why do we observe Daylight Saving Time? The simple answer is to save on energy costs. One of the biggest reasons we change our clocks to Daylight Saving Time (DST) is that it reportedly saves electricity. Newer studies, however, are challenging long-held reason. In general, energy use and the demand for electricity for lighting our homes is directly connected to when we go to bed and when we get up.