Labels:text | screenshot | black | black and white OCR: Dopamine can also be classified as a ace it is hypophysiotrophic pituitary hormone ad in present in hypophysical-portal vessel b of its sufficient concentrations to duplicate a. of known inhibitory effects on the secreti ructure prolactin (Fig. 1.10). Several hormones rs (PRFs) thought to act as prolactin-releasing fac olypeptide include TRH and vasoactive intestinal ut. (VIP), the latter also being found in the See also: · Vasoactive Intestinal Polypeptide