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Friday, 25 October 2013

Weight Loss Sabotage

The thyroid is composed mostly of follicular cells that produce T3 and T4 hormones. the hormone T4 (thyroxine) and T3 hormone (triiodothyronine) is derived from the amino acid tyrosine while iodination of the amino acid. parafollicular cells secrete the hormone calcitonin. Iodine is essential to the function of the thyroid gland. Iodine is a chief component of the hormones produced by the thyroid gland. Iodine deficiency can cause thyroid dysfunction, hence the need for iodized salt. The thyroid also produces and secretes the hormone calcitonin.

The hormone calcitonin decreases plasma concentration of calcium ions inhibiting the release of calcium ions from bone. calcitonin secretion is regulated by plasma calcium ion levels. thyroid plays an important role in regulating the body's metabolism. what body? Metabolism is a chemical reaction that occurs in the body's cells, releasing energy from nutrients ingested.

The body also uses energy to create other biologically important substances such as proteins. basal metabolic rate (BMR) is a measurement of body energy required to maintain functioning at rest (measured in calories). exertion, stress, fear, pain and increase the body's metabolic rate. thyroid are many other bodily functions. The thyroid helps regulate calcium levels in the body. The thyroid can increase the body temperature, thus burning more calories. This in turn increases the body's appetite. The thyroid also promotes glucose catabolism. catabolism is the break down of glucose complex forms to simpler, more usable forms of energy for use.

This gland stimulates protein synthesis, increases lipolysis. Lipolysis is the hydrolysis of lipids (fats), where the lipids are broken down into simpler forms or usable. The thyroid also promotes normal heart function, normal neural development in infants and growing baby, and normal neural function in adults. ? The thyroid is influenced by hormones produced by the pituitary gland and the hypothalamus. The pituitary gland is located at the base of the brain. This gland produces thyroid stimulating hormone (TSH). TSH stimulates the thyroid gland to absorb iodine and then synthesize and release thyroid hormones. 's hypothalamus is located above the pituitary gland in the brain.

This hormone produces thyrotropin releasing hormone (trh). The hypothalamus and pituitary gland detect low levels of thyroid hormones in the blood. trh is released by the hypothalamus to stimulate the pituitary gland to release TSH. TSH in turn stimulates the thyroid gland to produce more T3 and T4 hormones. it returns thyroid hormone levels in the blood return to normal. inflammation of the thyroid or lack of iodine causes the condition called hypothyroidism.

The thyroid hormones to be secreted under or is not secreted at all with hypothyroidism. Hypothyroidism symptoms include fatigue, slowed heart and respiratory rate, cold intolerance, and weight gain. Newborn infants with hypothyroidism (cretinism) is characterized by mental retardation and short stature. thyroid can also become over stimulated with a condition termed hyperthyroidism. This results in the over secretion of thyroid hormones. symptoms associated with this disorder include an increased metabolic rate, profuse sweating, heart palpitations, weight loss, protruding eyes, and the feeling of excessive heat. the same conditions as thyroid enlarges often resulting in goiter.

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