Thyroid-Stimulating Hormone (TSH). Guide. A thyroid-stimulating hormone (TSH) blood test is used to check for thyroid gland problems. TSH is produced when the hypothalamus releases a substance called thyrotropin-releasing hormone (TRH). TRH then triggers the pituitary gland to release TSH.
A Raven is black but depending on which way the light hits it they change to other colors like bluish, dark red, or greenish. There are white Ravens but are not albino.
House Colors: The house colors of Ravenclaw are blue and bronze, however in the movies they are blue and a grayish-silver. No one really knows why they were changed for movies. Mascot or Symbol: The symbol for Ravenclaw house is an Eagle, although in the movies it became a Raven, no one is quite sure why.