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.
But the sandwich actually dates back much further, to 110 BCE or so, when Jewish sage Hillel the Elder wrapped lamb and herbs in soft matzah. Today in America, we have a National Sandwich month, and that month is August and August begins today. Let's celebrate with a sandwich! Or 31 sandwiches! That's right, we're bringing you one sandwich for every day of National Sandwich month.