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.
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.he first day of Hanukkah is the start of a celebratory period in which a four-sided toy called dreidel is used for games. The first night of Hanukkah is also a night when people sing traditional songs to celebrate Hanukkah. Gift-giving is also popular at this time of the year.