The pituitary gland is further specialized into three functional areas. what is a hormone that is stored in the posterior lobe?

They are known as posterior pituitary hormones and include oxytocin and antidiuretic hormone. Nonetheless, these hormones are synthesized by the hypothalamus. The anterior pituitary receives signaling molecules from the hypothalamus, and in response, synthesizes and secretes hormones such as the  thyroid-stimulating hormone and growth hormone.

i think it would be b. tissue because an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.