A)Hormones that bind to endocrine glands and stimulate the secretion of a second hormone B)Hormones that bind to endocrine glands and inhibit the secretion of a second hormone C)A longer protein or peptide that is cleaved into shorter ones,at least one of which is a peptide or protein hormone D)Hormones that stimulate the expression of receptors for a second hormone,promoting their action E)Steroid hormones that are inactivated by having hydroxyl groups removed from their structure