The hypothalamus uses releasing hormones to regulate secretions of tropic hormones from the

The answer would be: anterior pituitary

Hypothalamus secretes many hormones that will bind to anterior pituitary and makes it secretes many kinds of tropic hormones. Anterior pituitary able to secrete gonadotropic, somatotropic, thyrotropic, lactotropic, or corticotropic hormones. All these hormones will have to travel to their specific endocrine glands.