Читать книгу Essential Endocrinology and Diabetes - Richard I. G. Holt - Страница 22

These hormones are small water‐soluble compounds. Melatonin is derived from tryptophan, whereas tyrosine derivatives include thyroid hormones, catecholamines, and dopamine, which regulates prolactin secretion in the anterior pituitary. The catecholamine hormones, epinephrine (also called adrenaline) and norepinephrine (noradrenaline) are secreted by the adrenal medulla as well as being sympathetic neurotransmitters, emphasizing the close relationship between the nervous and endocrine systems (Figure 1.2). Like peptide hormones, they are stored in granules prior to release.