Hormone hierarchy of action

See also Hormone Action, Hormone Mechanisms of Action, Hormone Hierarchy of Action, Receptors with Protein Kinase Activity, Steroid and Thyroid Hormones - Intracellular Receptors, Action of Insulin, Action of Glucagon, Action of Epinephrine... 

See also Hormone Action, Hormone Receptors, Hormone Hierarchy of Action, G Proteins and Signal Transduction... 

See also Hormone Hierarchy of Action, Hormone Action... 

Hormonal regulation involves a hierarchy of cell types acting on each other either to stimulate or to modulate the release and action of a hormone. Secretion of hormones from endocrine cells is stimulated by chemical signals from regulatory cells that occupy a higher position in this hierarchy (Figure 23.8). 

Most pituitary hormones act on endocrine glands that occupy an intermediate, or secondary, position in the hierarchy, stimulating them to produce hormones that exert the ultimate actions on target tissues. Pituitary hormones that act on other endocrine glands are called tropic hormones or tropins. An example is adrenal corticotropic hormone (ACTH), also called / -corticotropin (see here also). This peptide is secreted from the anterior pituitary, and it stimulates the adrenal cortex to produce glucocorticoids and mineralocorticoids, which in turn act on a number of tissues. 

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