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.
Rosh Hashanah, the Jewish New Year, is celebrated in 2014 from sundown on September 24 to nightfall on September 26. The Hebrew date for Rosh Hashanah is 1 Tishrei 5775.hough Rosh Hashanah literally means head of the year, the holiday actually takes place on the first two days of the Hebrew month of Tishrei, which is the seventh month on the Hebrew calendar.