1 The phenotype may change constantly throughout the life of an individual because of environmental changes and the physiological and morphological changes associated with aging.
One special group of hormones is the tropic hormones that stimulate the hormone production of other endocrine glands. For example, thyroid-stimulating hormone (TSH) causes growth and increased activity of another endocrine gland, the thyroid, which increases output of thyroid hormones. hormone (from Greek á½ÏÎ¼Î®, impetus) is any member of a class of signaling molecules produced by glands in multicellular organisms that are transported by the circulatory system to target distant organs to regulate physiology and behaviour.
Sometimes called the master gland, the pituitary gland is the primary influencer of how your other glands operate. The pituitary gland secretes and stores hormones, which it uses to stimulate your other glands. Your hormones regulate a variety of body functions, such as temperature, urine production, thyroid activity, growth in children, and the production of sex hormones (testosterone in men and estrogen in women).