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.
Thyroid stimulating hormone stimulates the release of hormones from the thyroid gland that regulate metabolism. Hypopituitarism. In hypopituitarism, there is a lack of one or more pituitary hormones. Lack of the hormone leads to loss of function in the gland or organ that it controls.n humans the pituitary gland or hypophysis has two basic parts called the anterior and posterior pituitary. The anterior part of the pituitary, adenohypophysis, is regulated by the hypothalamus and by a negative feedback from target organs.