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.
More. U.S. Rep. Ron DeSantis plans to run for Marco Rubio's Senate seat in 2016. The Florida Republican congressman made the announcement via email on Wednesday. He becomes the first major Republican to vie for the seat being vacated by Rubio, who is running for president.DeSantis, 36, currently represents Florida's 6th District.he Florida Republican congressman made the announcement via email on Wednesday. He becomes the first major Republican to vie for the seat being vacated by Rubio, who is running for president. DeSantis, 36, currently represents Florida's 6th District.