This test measures a substance called parathyroid hormone (PTH) in your blood. PTH is made by four tiny parathyroid glands in your neck. PTH circulates in your blood and is needed to regulate the level of calcium in your blood.our heart, bones, nervous system, and kidneys need a normal calcium level in the blood to work the way they should. If your calcium level is too low, your parathyroid glands release PTH to get more calcium into your blood.
DEFINITION of 'Municipal Bond'. A debt security issued by a state, municipality or county to finance its capital expenditures. Municipal bonds are exempt from federal taxes and from most state and local taxes, especially if you live in the state in which the bond is issued. Also known as a muni..
The last type of municipal bond is a taxable municipal bond. Taxable municipal bonds exist because the federal government doesn't finance certain types of projects that don't have a clear benefit to the public, like local sports facilities or the funding of a faltering city pension plan [source: Securities Industry and Financial Markets Association].