What hormones are produced by thyroid gland?

human Thyroid gland produces hormones that affect the human body in multiple ways. The truth is, not every person knows what kind of hormones are the "creation" of the thyroid gland. In this article we will look at what hormones the gland produces, why they are needed and also what are their norms. And tell us about it the editor of the site proshchitovidku.ru where you will find everything that relates to this authority.

thyroid

Hormones called biologically active substances that remotely act directly on cells of the human body. By the way, the thyroid is exposed to absolutely all the cells of our body. The thyroid produces 3 active hormone: calcitonin, triiodothyronine and thyroxine. For example, the first hormone is involved in the regulation of metabolism of phosphorus and calcium in the human body.

Speaking about the thyroid, often mean tetraiodothyronine (thyroxine) and triiodothyronine. They conventionally denoted T4 and T3. Their names these hormones was due to the presence of iodine molecules in their composition. So, in tetrajodtironina-4 molecules of iodine, and triiodothyronine — a 3-ri.

most Likely, you Express an objection, and say that T4 and T3 is not all of the thyroid, because, often, pass more and thyroid-stimulating hormone (TSH). But in reality, TSH is a hormone, not thyroid, and the pituitary gland — on the endocrine system, which is located in the cavity of the skull and regulates how the thyroid gland and other endocrine organs.

In the blood T4 and T3 are bound to proteins and the free state. Often, in the free fraction of the hormone accounts for only 0.2-0.5% of all cases, while the bound fraction of the hormone circulating in our blood in > than 99 % of all cases. The biological effect is the free fraction of these hormones. In addition, these hormones differ in the strength of its impact. The most active is T3, which is why it is not so much in the blood, and specifically it has absolutely everything biological effects. Though hormone T4 is equally important, as it transformirovalsya to T3, if necessary.

Translated by "Yandex.Translate": translate.yandex.ru.