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.
List of Hebrew Months. Hebrew Month of Av. The Jewish month of Av has 30 days and takes place in the summer, usually around August time. It is actually the only Hebrew month of year that is not mentioned in the bible, but is first spoke about in the Talmud. There are two festivals that are in Av. On the 9th and on the 15th.