A thyroid scan can show the size, shape, and location of the thyroid gland . It can also find areas of the thyroid gland that are overactive or underactive. The camera takes pictures of the thyroid gland from three different angles. The radioactive tracer used in this test is either iodine or technetium.
The current U.S. Senate has 54 Republicans and 45 Democrats (including one independent). The 2016 Senate election takes place on November 8, 2016. There are 34 seats up in 2016, of which 24 are held by Republicans. Democrats will need to gain 4 or 5 seats to take control.
All class 3 Senators are up for election; class 3 was last up for election in 2010, when Republicans won a net gain of six seats. Currently, Democrats are expected to have 10 seats up for election, and Republicans are expected to have 24 seats up for election. Special elections may also be held to fill vacancies that occur during the 114th United States Congress.