Gland products are localized to region around duct. Hormone-producing cells secrete hormones directly into bloodstream. Chemicals circulate through whole body. Consult The Endocrine Web . Excessive drinking leads to production of excessive quantities of urine, eventually to dehydration.
Athletes sometimes take in attempt to stimulate muscle growth.
Can lead to long term problems, also illegal. Controls development, regulates metabolism. A woman discovers she has a thyroid problem after a long period of undiagnosed ailments, and some ways of dealing with it. Once bound, enter nucleus, bind with genes to regulate DNA transcription. Cannot cross cell membrane, instead must bind to receptor on outside of cell.