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.
Passover is the most important holiday in the Jewish calendar. It's an eight-day festival (seven days for Reform Jews and Jews in Israel) celebrated in the early spring, starting on the 15th day of the Hebrew month of Nisan.assover is the most important holiday in the Jewish calendar. It's an eight-day festival (seven days for Reform Jews and Jews in Israel) celebrated in the early spring, starting on the 15th day of the Hebrew month of Nisan.