Question

List three criteria to classify a molecule as a hormone.

Answer 1

1.Hormones are organic molecules produced in endocrine glands or some specialized cells of multicellular organism.

2. Hormones are either steroids or eicosanoids or amino acid derivatives (amines, peptides and proteins)

3. Hormones are molecules produced by endocrine system or specialized cells which are either diffused into blood and transported to target cell and bind to specific receptors or affect same cell (autocrine) or nearby cell (paracrine) and serve to communicate between organ and tissue and regulate physiological and behavioral activities. (Serve as chemical messengers).