What Is Thyroxine?

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Thyroxine is secreted into the bloodstream by the thyroid gland. It contains iodine and is a derivative of the amino acid tyrosine. The function of thyroxine is to control development, maturation and metabolism. Thyroid hormones are essential for physical and mental development. Tyrosine is the inactive form, and most of it is converted to an active formed called triiodothyronine. The production and release of thyroid hormones is controlled by a feedback loop system which involved the hypothalamus and the pituitary and thyroid glands. The hypothalamus secretes thyrotropin-releasing hormone. It then stimulates the pituitary gland to produce a thyroid stimulating hormone. Lastly, this hormones stimulates the production of the thyroid hormones …show more content…
This is known as a condition called thyrotoxicosis. The most common cause of this is an veracity in the thyroid gland. For example, Graves’ diseases causes an inflammation of the thyroid or a tumor on the thyroid. Another case is called goitre, which is a swelling of the neck due to an enlargement of the thyroid gland. Symptoms of thyrotoxicosis include intolerance to heat, weight loss, increased appetite, increased bowel movements, irregular menstruate cycle, rapid or irregular heartbeat, palpitations, tiredness, irritably, tremor, hair loss, and retraction of the eyelids resulting in a ‘staring’ appearance. It is possible to have too much thyroxine however their can also be too little production of thyroxine. This condition is known as hypothyroidism. The most common causes is autoimmune diseases, poor iodine intake or brought on by the use of certain drugs. Also, sometimes the cause is unknown. Hypothyroidism during development or before with and during childhood causes mental impairment and reduce psychical growth. The symptoms of the condition include fatigue, intolerance of cold temperatures, low heart rate, weight gain, reduced appetite, poor memory, depression, stiffness of the muscles and infertility. Thyroxine is an essential hormones used within the body. It plays vital roles in regulating the body. Too much or too little of thyroxine can cause complications within the body. The right amount is essential for physical and mental

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