BIOL 1080 Chapter Notes - Chapter 3: Myxedema, Iodine, Autoimmune Disease

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Posterior lobe: does not produce any hormones of its own, neurons on hypothalamus manufacture adh and ot. Travel down the nerve cells into the posterior pituitary to be stored and released. Adh antidiuretic hormone: main function to conserve body water by decreasing urine output. Prompts the kidneys to remove water from the fluid going to the urine: alcohol temporarily inhibits secretion of adh. Increased urination causing dehydration and headache and dry mouth: also called vasopressin. Role in constricting blood vessels and raising blood pressure, especially during times of severe blood loss: deficiency may result from damage to either posterior pituitary or area of hypothalamus responsible for its manufacturing. Treatment: administration of synthetic adh in nasal spray. Stimulate milk ejection from the mammary glands: control of ot is positive feedback mechanism, pitocin is synthetic form of ot can induce and speed up labour. Thyroid gland: shield-shaped, deep red structure in the front of the neck.

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