suppressive effect on pituitary TSH secretion (9). They also found that it was much more potent than T4 (10), although it was less abundant than T4 in the thyroid gland (11). Based on these findings Gross and Pitt-Rivers hypothesized that T3 was the active peripheral thyroid hormone and T4 was its precursor.
(Photo: Tom Tingle/The Republic) U.S. Sen. Jeff Flake may have a long two years ahead of him. Up for re-election in 2018, the first-term Arizona Republican is already under attack from the right and the left.
The current Senior U.S. Senator from Florida is Democrat Bill Nelson. He was sworn into the Office of U.S. Senator on January 3rd, 2001. Bill Nelson is 73 years old and serving his third elected term as U.S. Senator. His Florida senatorial seat will be up for regular election on November 6th, 2018. Bill Nelson is eligible for re-election in 2018 and has announced his candidacy.