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.
Complete listing of the Jewish holidays and their dates. View the Aish.com Hebrew-English Calendar. Hanukkah, The Holiday of Lights -- celebrating the miracle of a little oil that lasted eight days, and continues to illuminate our lives to this day.srael Independence Day -- the historic return of the Jewish people to the Land of Israel is a modern miracle. Yom Yerushalayim. On the anniversary of the reunification of Jerusalem, we remember the special significance of the Holy City, and why it is the capital of the Jewish nation.