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.
Flake, a popular six-time Congressman who won previous elections with as much as 74 percent of the vote, strode into the seat of former Minority Whip Jon Kyl as a face of turnaround for the state and the Republican party. But, oh, how the mighty can fall in a time of guns, immigration, and constant polling.