Thyroid hormone function
[DOC File]Endocrine System Physiology- Thyroid Hormones
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Thyroid hormone has major effect on the development of the brain and CNS in the womb and during the neonatal period. T3 binds to specific receptors in the nuclear compartment of target cells. The effects of thyroid hormone are mediated by the regulation of the transcription of the genes coding for key enzymes and proteins.
[DOC File]Lecture: The Endocrine System
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A. Location - 4 or 5 small round bodies on the posterior surface of the lateral lobe of the thyroid gland B. Function - secretes the Parathyroid hormone that controls Blood Calcium homeostasis 1. increases Ca+2 and Mg+2 absorption from the Intestines, Kidneys and Bones [raises blood calcium levels]
[DOC File]ANATOMY AND PHYSIOLOGY | Science of the human body
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What is a goiter and what may cause one? A goiter is an enlarged thyroid gland that is usually caused by lack of iodine. Without iodine, the thyroid cannot make T3 and T4, and thus nothing inhibits the release of TSH which continues to over stimulate the thyroid. calcitonin: What is the function of this hormone?
[DOC File]Thyroid disease: guidelines for diagnosis and management
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Serum thyroid stimulation hormone (TSH) measurement is the single most reliable test to screen for and to diagnose all common forms of hypothyroidism and hyperthyroidism. Most labs now use third-generation TSH assays, which have detection sensitivity of less than 0.02 mU/L.
[DOC File]THYROID DYSFUNCTION AND HOMEOPATHY
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Low thyroid function known as Hypothyroidism. is a condition in which the body lacks sufficient thyroid hormone. This occurs with greater frequency in women between the ages of 40-50, and may affect as many as 10% of women over age 50.
[DOC File]Functional Hypothyroidism
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Zinc, Vitamin E and Vitamin A function together in the manufacture of thyroid hormone. Low zinc levels are common in the elderly as is hypothyroidism. Zinc supplementation ahs been shown to reestablish normal thyroid function, even in those with “normal” T4 levels. B vitamins B1, B3, B6 as well as Vitamin C are necessary
[DOC File]Thyroid Hormones - Angelfire
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Therefore, total T4 is often a poor index of thyroid function. Decreased mental capacity: thought and speed are slow and memory is poor . Lack of thyroid hormone is likely to cause loss of libido, while great excesses can cause impotence. In women, lack of thyroid hormone often causes excessive a frequent bleedings in some women.
[DOC File]An Introduction to the Thyroid
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The thyroid hormone affects all physiological functions of your body. Hormones Released: thyroxine, tetraiodothrnine (T4), triiodothyronine (T3), and calcitonin. Interesting Fact: The shape is very similar to that of a Butterfly. Thyroid Cancer. Thyroid cancer is a fairly rare form of cancer that develops from the cells of the thyroid gland.
[DOC File]“My Brother Calls Me ‘Bug Eyes’”: A case study on the ...
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Name the two hormones commonly referred to as “thyroid hormone” and describe their general actions. The function of the thyroid gland is to take iodine, found in many foods, and convert it into thyroid hormones: thyroxine (T4) and triiodothyronine (T3). Thyroid cells are the only cells in the body which can absorb iodine.
[DOC File]THYROID HORMONES – pathology demonstrates very obvious S&S ...
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Represents about 10% of the thyroid hormone by the thyroid. Is about 4x as active or potent as T4. Is found in the blood in much lower amounts then T3. T3 is the active form of thyroid hormone. Has a much shorter half-life than T4. About 80% of serum concentration results from conversion of T4 to T3. T4 (3,5,3,5-tetraiodoithyronine)
[DOC File]Chapter 18: The Endocrine System
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Thyroid Stimulating Hormone (TSH) TSH stimulates the synthesis & secretion of T3 and T4 by the thyroid gland. Promotes release - thyrotropin releasing hormone (TRH) (Fig 18.12) Inhibits release - growth hormone inhibiting hormone (GHIH, somatostatin) and negative feedback by elevated levels of T3 and T4 . Follicle Stimulating Hormone (FSH) FSH ...
[DOC File]Anatomy and Physiology Unit 9 Review Sheet
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Can inhibit urine production by retaining water and electrolytes. In large amounts, causes vasoconstriction leading to increased blood pressure (vasopressin) Thyroid Gland At the base of throat, just inferior to adam’s apple Thyroid Hormone (made of T3 and T4) Major metabolic hormone that requires iodine for healthy function.
[DOC File]Topic 18: Hormones and the Endocrine System (Ch. 45)
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– the thyroid hormone. modified form of tyrosine produced by the thyroid gland. contains 4 or 3 iodine atoms (most made with 4) within target cells, all converted to 3-iodine form. bind with receptors in the nucleus. initiates growth-promoting mRNA synthesis. stimulates oxidative respiration. water-soluble hormones do not enter target cells
[DOC File]Answer Key to Short Answer Questions for
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Most thyroid hormone is secreted as T4 and converted in target cells to the more potent T3 form by removing one iodine atom. T3 binds to receptors in the nucleus to alter gene transcription, which has a variety of actions depending on the target cell. The primary action of thyroid hormone is to increase the body’s metabolic rate, which in ...
[DOC File]The Effect of Water Fluoridation on Thyroid Function in ...
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The dysfunction in thyroid activity observed with fluoride intake is a direct response to decreases in thyroid hormone production, thyroxine (T4) and triiodothyronine (T3), synthesized by the thyroid gland (Bouaziz et al., 2005; Cinar et al., 2005; Wang et al., 2009).
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