GENERAL HISTOLOGY

Detailed explanation-1: -It has a big impact on the body. Every part of metabolism is controlled by hormones that the thyroid gland makes. The thyroid gland produces two main hormones: thyroxine (T-4) and triiodothyronine (T-3). These hormones affect every cell in the body.

Detailed explanation-2: -If you have an overactive thyroid (hyperthyroidism), your thyroid gland produces too much of the thyroid hormones. This results in high levels of the 2 main thyroid hormones, triiodothyronine (also called T3) and thyroxine (also called T4) in your body.

Detailed explanation-3: -When you specifically have too much T3, you might experience thyrotoxicosis, a condition that comes from an overactive thyroid gland, or hyperthyroidism. It’s also important to note that hormone levels are very complex. For example, an elevated free T4-along with a low TSH-could indicate hyperthyroidism.

Detailed explanation-4: -Graves disease (most common cause of hyperthyroidism) Inflammation (thyroiditis) of the thyroid due to viral infections, some medicines, or after pregnancy (common) Taking too much thyroid hormone (common) Noncancerous growths of the thyroid gland or pituitary gland (rare)

Detailed explanation-5: -Your thyroid hormone levels will be compared to what’s normal for a healthy person of your age. A low level of TSH and high levels of T3 and/or T4 usually means you have an overactive thyroid. Doctors may refer to these measurements as “free” T3 and T4 (FT3 and FT4).