Blood urea nitrogen (BUN) test. Overview. A common blood test, the blood urea nitrogen (BUN) test reveals important information about how well your kidneys and liver are working. A BUN test measures the amount of urea nitrogen that's in your blood. 1  Your liver produces ammonia â which contains nitrogen â after it breaks down proteins used by your body's cells.  The nitrogen combines with other elements, such as carbon, hydrogen and oxygen, to form urea, which is a chemical waste product.
Shortly after the Turner Turnpike was built in 1953, the Oklahoma Turnpike Authority proposed other toll roads including one to be built from Oklahoma City north to the Kansas border near Braman to tie in with the southern terminus of the Kansas Turnpike at the state line.
Financed by toll revenue bonds, the bridgeâtunnel was opened on April 15, 1964. It was officially named the Lucius J. Kellam Jr. BridgeâTunnel in August 1987 after one of the civic leaders who had long worked for its development and operation. However, it continues to be best known as the Chesapeake Bay BridgeâTunnel. From 1995 to 1999, at a cost of almost $200 million, the capacity of the above-water portion was increased to four lanes.