Tyrotropiinia

Tyrotropiinia, also known as thyroid-stimulating hormone (TSH), is a hormone produced by the pituitary gland in the brain. It plays a crucial role in regulating the thyroid gland, which is responsible for producing thyroid hormones. TSH acts on the thyroid gland to stimulate the production of thyroxine (T4) and triiodothyronine (T3), which are essential for various metabolic processes in the body.

TSH levels are typically regulated by the amount of thyroid hormones present in the blood. When thyroid hormone levels are low, the hypothalamus releases thyrotropin-releasing hormone (TRH), which stimulates the pituitary gland to produce and release more TSH. Conversely, when thyroid hormone levels are high, the hypothalamus reduces the release of TRH, leading to a decrease in TSH production.

Elevated TSH levels can indicate hypothyroidism, a condition characterized by an underactive thyroid gland. Conversely, low TSH levels can suggest hyperthyroidism, where the thyroid gland is overactive. Both conditions can lead to various symptoms, including fatigue, weight changes, and changes in heart rate.

TSH levels are commonly measured as part of a thyroid function test, which may be ordered by a healthcare provider to evaluate thyroid function. The normal range for TSH levels can vary depending on the laboratory and the specific test used, but it typically falls between 0.4 and 4.0 mIU/L.