Parathyroid hormone (PTH), also called parathormone or parathyrin, is a hormone secreted by the parathyroid glands that is important in bone remodeling, which is an ongoing process in which bone tissue is alternately resorbed and rebuilt over time. PTH is secreted in response to low blood serum calcium (Ca 2+) levels.
See also: Legionnaires' disease. On July 21, 1976, the American Legion opened its annual three-day convention at the Bellevue-Stratford Hotel in Philadelphia, Pennsylvania. More than 2,000 Legionaires, mostly men, attended the convention.
They opened their first hotel, the Twin Bridges Marriott Motor Hotel, in Arlington, Virginia, in 1957. Their second hotel, the Key Bridge Marriott in the Rosslyn neighborhood of the same city, is Marriott Internationalâs longest continuously operating hotel, and celebrated its 50th anniversary in 2009.