The Posterior Pituitary

The Posterior Pituitary - hormones in three classes:...

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The Posterior Pituitary The posterior pituitary stores and releases hormones into the blood. Antidiuretic hormone (ADH) and oxytocin are produced in the hypothalamus and transported by axons to the posterior pituitary where they are dumped into the blood. ADH controls water balance in the body and blood pressure. Oxytocin is a small peptide hormone that stimulates uterine contractions during childbirth. Other Endocrine Organs The Adrenal Glands Each kidney has an adrenal gland located above it. The adrenal gland is divided into an inner medulla and an outer cortex . The medulla synthesizes amine hormones, the cortex secretes steroid hormones. The adrenal medulla consists of modified neurons that secrete two hormones: epinephrine and norepinephrine . Stimulation of the cortex by the sympathetic nervous system causes release of hormones into the blood to initiate the "fight or flight" response. The adrenal cortex produces several steroid
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Unformatted text preview: hormones in three classes: mineralocorticoids , glucocorticoids , and sex hormones. Mineralocorticoids maintain electrolyte balance. Glucocorticoids produce a long-term, slow response to stress by raising blood glucose levels through the breakdown of fats and proteins; they also suppress the immune response and inhibit the inflammatory response . The Thyroid Gland The thyroid gland is located in the neck. Follicles in the thyroid secrete thyroglobulin, a storage form of thyroid hormone. Thyroid stimulating hormone (TSH) from the anterior pituitary causes conversion of thyroglobulin into thyroid hormones T4 and T3. Almost all body cells are targets of thyroid hormones. Thyroid hormone increases the overall metabolic rate, regulates growth and development as well as the onset of sexual maturity.Calcitonin is also secreted by large cells in the thyroid; it plays a role in regulation of calcium....
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The Posterior Pituitary - hormones in three classes:...

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