The thyroid gland (thyroid) - a small endocrine organ, which lies on the front of the neck just above the sternum levothyroxine ingredients. It consists of the right and left lobes, which are connected by a small isthmus. Endocrine - meaning that the body secretes, ie produces biologically active substances -. Hormones that are not derived from our body and are designed to regulate the processes therein.
The thyroid gland secretes two important hormones - thyroxine (T4) and triiodothyronine (T3). These hormones regulate the processes of fat metabolism, protein and carbohydrates, the function of the cardiovascular system, gastrointestinal tract, sexual and mental activities.
In turn, the intensity of production of these hormones is regulated pituitary thyroid stimulating hormone (TSH) in the feedback law. The higher blood levels of T3 and T4, the lower stands TTG and vice versa - the weaker iron works, the higher levels of TSH, which stimulates its function. Quantity-regulator hormone may be elevated or lowered in 30 times or more.
If the TSH level in the blood is normal, it virtually eliminates the thyroid dysfunction. Throughout a person's life normal levels of thyroid hormone is essential for the harmonious functioning of the body. They have an effect on metabolic processes in the body, growth and differentiation of tissues, stimulates protein synthesis, affect sexual development, menstrual function, ovulation.
Thyroid disease can be divided into in violation of its functions under which disrupted hormones, and disease in violation of its structure.
Thyroid disorders may manifest as irritability (or, conversely, depression), fatigue, change in weight, intolerance to heat or cold, high blood pressure, rapid heartbeat, menstrual disorders and infertility in women.
Diseases with impaired thyroid function occur with increased or decreased production of hormones T3, T4, TSH.
Symptoms of increased function (hyperthyroidism) may include the following: severe nervousness, irritability, tremors in the hands or the whole body, weight reduction on the background of a good appetite, sweating, intolerance to heat, fatigue, high blood pressure, heart palpitations, heart rhythm disturbance on type of atrial fibrillation, diarrhea, facial flushing, insomnia. Sometimes the data eye disease symptoms joins: sensation of "sand" in the eyes, double vision, and an increase in the protrusion of the eye - exophthalmos (exophthalmia).
Increasing function at a young age due, usually with Graves' disease (diffuse toxic goiter); in old age - with thyroid autonomy.
Graves' disease - a disease in which for some unknown reason, the body produces specific antibodies against the thyroid gland. When iron autonomy (or just part of it) is getting out of control and running uncontrollably, often too active.
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