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.
Select another year-range: Many Jewish Canadians celebrate Rosh Hashana (or Rosh Hashanah), which is also known as the Jewish New Year. Rosh Hashana starts on the first day of Tishrei (or Tishri), which is the seventh month in the Jewish calendar, and may last for two days.any Jewish Canadians observe Rosh Hashanah, known as the New Year in the Jewish calendar, for two days, while others celebrate the event for one day.