The renal medulla is split up into a number of sections, known as the renal pyramids. Blood enters into the kidney via the renal artery, which then splits up to form the arcuate arterioles. The arcuate arterioles each in turn branch into interlobar arterioles, which finally reach the glomeruli.he renal medulla only receives about 10% of all the blood flowing through the kidneys. You could say that the function of the renal medulla, or the kidney in general, is maintaining homeostasis of a large number of solutes and water.
Former Republican President Ronald Reagan is widely recognized as one of America's best presidents for economic expansion. But his party's overall economic track record isn't nearly as sterling. Michael Evans/The White House/Getty Images.
During the Reagan Administration, it seemed that trickle-down economics worked. Reagan cut taxes significantly. The top tax rate fell from 70% (for those earning $108,000+) to 28% (for anyone with an income of $18,500 or more). The corporate tax rate was also cut, from 46% to 40%.