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 Holidays: Yom Ha'atzmaut - Israeli Independence Day. Held on the fifth day of the Hebrew calendar month of Iyar, Yom Ha'atzmaut is a modern holiday celebrating Israel's independence in 1948. Israeli Independence Day is always immediately preceded by Yom Hazikaron - Memorial Day for the Fallen Israeli Soldiers.