During a HIDA Scan a scanner monitors the radioisotope that was initially injected. When (CCK) cholecystokinin, a hormone that's normally released by the body after a meal, is injected, the contraction of the gallbladder is identified on the scan. Reduced contraction (which often produces pain) may mean anything from actual gallbladder disease/dysfunction, to inflammation or scarring.
United States History. Volstead Act. Andrew J. Volstead, Republican representative from Minnesota, was the driving force behind the National Prohibition Act (popularly the Volstead Act), written to provide for the enforcement of the recently ratified 18th Amendment.
Drive Theory. The Drive Theory is an important concept in psychoanalysis. Developed by Sigmund Freud, it was presented in his book, âThe Ego and the Idâ, which was published in 1923. Throughout the decades, the Drive Theory has gone through various changes. It has also garnered a lot of critique.