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.
Â©iStockphoto.com/MarkCoffeyPhoto. Jewish communities in the United States celebrate the first day of Hanukkah on the 25th day of the month of Kislev in the Jewish calendar. The Hanukkah period lasts for eight days and is celebrated from the 25th day of Kislev to the second day of Tevet. The first night of Hanukkah (or Chanukah) starts with special blessings at sunset the day before the 25th of Kislev.