Thyroid hormones (T 4 and T 3) are produced by the follicular cells of the thyroid gland and are regulated by TSH made by the thyrotropes of the anterior pituitary gland. The effects of T 4 in vivo are mediated via T 3 (T 4 is converted to T 3 in target tissues). T 3 is 3- to 5- fold more active than T 4.
May is Jewish American Heritage Month The Library of Congress, National Archives and Records Administration, National Endowment for the Humanities, National Gallery of Art, National Park Service and United States Holocaust Memorial Museum join in paying tribute to the generations of Jewish Americans who have helped form the fabric of American history, culture and society.
As a result of our efforts, the week of March 8th (International Womenâs Day) was officially designated as National Womenâs History Week. In 1987, we led the successful campaign to have the entire month of March declared National Womenâs History Month. We mobilize and unify the national celebrations of Womenâs History Month in March each year by choosing an annual theme. We promote a multicultural womenâs history perspective by honoring women of diverse cultural, ethnic, occupational, racial, class, and regional backgrounds.